Article
Nanoscience & Nanotechnology
Jeong-Min Park, Yakai Zhao, Thomas Voisin, Dong-Hyun Lee, Shin-ichi Komazaki, Yoonseok Ko, Dong-Ik Kim, Jin-Yoo Suh, Heung Nam Han, Y. Morris Wang, Upadrasta Ramamurty, Jae-il Jang
Summary: The effect of hydrogen charging on the nanoindentation response of a selective laser melted 316L austenitic stainless steel was investigated. Results showed that the hardness increment due to hydrogen charging in SLM samples was relatively smaller compared to conventionally manufactured samples. The study also found that the charged SLM alloy had a lower hydrogen content and apparent hydrogen diffusivity, attributed to the ultrafine solidification cell structure in the SLM alloy. Additionally, the cell walls in the SLM alloy were relatively insensitive to hydrogen charging compared to the cell interiors.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Ricardo Santamaria, Mobin Salasi, William D. A. Rickard, Kod Pojtanabuntoeng, Garry Leadbeater, Mariano Iannuzzi, Steven M. Reddy, Md Zakaria Quadir
Summary: There is a growing interest in using selective laser melting (SLM) for metal additive manufacturing. However, our understanding of SLM-printed stainless steel is limited due to complex process variables. This study found discrepancies in crystallographic textures and microstructures compared to previous literature. The as-printed material showed macroscopic asymmetry in structure and crystallographic texture, with specific low-angle boundary features being identified as non-crystallographic.
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Qisheng Sun, Ying Liu, Bangjun Li, Zheng Zhang, Bingqian Xu, Songsong Xu, Ying Han, Yanxin Qiao, Jing Han, Guosong Wu, Paul K. Chu
Summary: The study investigates the use of ultrasonic severe surface rolling (USSR) to enhance the corrosion resistance of SLM 316L stainless steel, and finds that the USSR processed samples exhibit significant improvement in corrosion resistance, attributed to the unique gradient structure and chemically homogeneous and high-quality surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
I. I. Cuesta, A. Diaz, M. A. Rojo, L. B. Peral, J. Martinez, J. M. Alegre
Summary: Additive manufacturing of metallic materials is widely used in various sectors. In order to ensure reliable performance of parts, it is necessary to study the effect of additive manufacturing on mechanical properties. This paper focuses on the application of Selective Laser Melting technology in the automotive industry and aims to optimize key parameters in the printing process to obtain parts with good resistance.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Manufacturing
Ying Liu, Jiapeng Sun, Yantao Fu, Bingqian Xu, Bangjun Li, Songsong Xu, Peilong Huang, Jianing Cheng, Ying Han, Jing Han, Guosong Wu
Summary: The gradient heterogeneous structure (GHS) architecture is proposed to achieve superior strength and ductility combination in additively manufactured (AM) 316L stainless steel. The GHS system consists of a gradient structured outer layer with varying grain size and a hierarchically heterostructured interlayer with varying length scales. By combining two types of heterogeneous structures, the GHS strengthens the synergistic effect, resulting in high-performance AM parts with superior strength and ductility.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Zahra Abbasi, Hamid Reza Abedi
Summary: This study investigates the hot deformation behavior and recrystallization mechanisms of selective laser melted 316L stainless steel. The results show that the development of substructures and continuous recrystallization are the main softening mechanisms during thermomechanical processing. The presence of cellular substructures facilitates recrystallization, and both discontinuous and geometric dynamic recrystallization contribute to the deformation process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yiwei Sun, Jialong Wang, Menglin Li, Yuxuan Wang, Changhao Li, Ting Dai, Menglong Hao, Hui Ding
Summary: Fabricating molds and dies using additive manufacturing (AM) technology is attractive for higher cooling efficiency. This study investigated the thermal and mechanical properties of an H13 tool steel processed by selective laser melting (SLM) and identified the factors affecting its thermal conductivity.
MATERIALS & DESIGN
(2022)
Article
Engineering, Chemical
Marius Hilzenthaler, Luca Bifano, Florian Scherm, Gerhard Fischerauer, Andrea Seemann, Uwe Glatzel
Summary: The study found that after recycling AISI 904L stainless steel powder ten times, the flowability significantly increased, while there were no significant changes in the chemical composition and particle size distribution of the powder. The printed parts maintained comparable density and mechanical properties, indicating excellent recyclability of the powder material.
Review
Materials Science, Multidisciplinary
Alessandro M. Ralls, Merbin John, Jennifer Noud, Jose Lopez, Kasey LeSourd, Ian Napier, Nicholas Hallas, Pradeep L. Menezes
Summary: This review summarizes the existing literature on selective laser melting (SLM) steel, explores its fabrication factors and the underlying mechanisms driving its mechanical, tribological, and corrosion performance, and provides suggestions for future research directions.
Article
Materials Science, Multidisciplinary
Peyman Ansari, Asif Ur Rehman, Fatih Pitir, Salih Veziroglu, Yogendra Kumar Mishra, Oral Cenk Aktas, Metin U. Salamci
Summary: This study proposes a multiphysics numerical model to explore factors affecting parts production in the SLM process and their mathematical relationships, using stainless steel 316L powder. The effect of laser power and laser spot diameter on melt-pool temperature was studied, and mathematical expressions were obtained to relate process parameters to temperature levels. The study validates the model through the production of test samples using simulated parameters, showing acceptable microstructures for suitable parameter sets.
Article
Chemistry, Physical
Ireneusz Szachogluchowicz, Bartosz Fikus, Krzysztof Grzelak, Janusz Kluczynski, Janusz Torzewski, Jakub Luszczek
Summary: This paper analyzes the behavior of M300 maraging steel under ballistic testing conditions and concludes that the material can be a useful material for certain armor solutions after pre- or post-processing activities. While solution annealing and aging can increase ballistic properties, they also increase the material's brittleness, affecting a significant growth in fragmentation of the perforated plate.
Article
Nanoscience & Nanotechnology
J. Karimi, C. Suryanarayana, I Okulov, K. G. Prashanth
Summary: This study investigated the effect of remelting on the microstructure and mechanical properties of Ti6Al4V materials fabricated using selective laser melting. The results showed that the number of remeltings significantly influenced the homogenization of the microstructure and mechanical properties of the materials, with an increase in hardness and ultimate tensile strength but a decrease in ductility observed with a higher number of melting steps.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Feng Xu, Feiyu Xiong, Ming-Jian Li, Yanping Lian
Summary: This study presented a numerical model to investigate the grain growth mechanisms during selective laser melting. The simulation results were in good agreement with experimental data. The findings of this study are significant for optimizing process parameters and controlling the microstructure and mechanical properties of fabricated parts.
Article
Materials Science, Multidisciplinary
Jie Chen, Chuang Liu, Kewei Dong, Shuai Guan, Qipeng Wang, Xianfeng Zhang, Yong Peng, Jian Kong, Kehong Wang
Summary: This study investigates the anisotropy in dynamic compressive deformation of 316L stainless steel fabricated by the wire and arc additive manufacturing process (WAAM). It is found that the <111> samples exhibit higher dynamic flow stresses due to lower density of deformation twins. The anisotropy of resistance to adiabatic shearing is observed, with the order of <100>, <110>, <112>, and <111>. Micro-texture discrepancy from adiabatic shear bands (ASB) is attributed to the precondition change of macro texture in the matrix.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Arshad Yazdanpanah, Mattia Lago, Claudio Gennari, Manuele Dabala
Summary: The study investigated the effect of grinding-induced surface residual stress on stress corrosion cracking of SLM manufactured 316L austenitic stainless steel. High residual stress increased the risk of early SCC, with cracks initiating and propagating from melt pool boundaries, grains, machining marks, and pore sites. Galvanostatic tests identified three distinctive regions corresponding to crack and pit initiation and growth, highlighting the synergistic effects of dislocation density, stress concentration, molybdenum segregation, and surface residual stress on SCC susceptibility.
Article
Materials Science, Multidisciplinary
Frederic van Gen Hassend, Lukas Ninnemann, Felix Toeberich, Michael Breuckmann, Arne Roettger, Sebastian Weber
Summary: The production of thin-wall ductile iron by high-pressure die-casting faces various challenges, but results show that graphite formation at 1100°C and austempering at 360°C for 40 minutes can improve mechanical properties and microstructure of the components.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Anna Luise Strauch, Volker Uhlenwinkel, Matthias Steinbacher, Felix Grosswendt, Arne Roettger, Abootorab Baqerzadeh Chehreh, Frank Walther, Rainer Fechte-Heinen
Summary: This study examines different blends of starting materials for alloy development in the LPBF process, showing that the admixed SiC dissolves completely during LPBF but results in an inhomogeneous microstructure. The use of lower melting ferroalloys FeSi and FeC, as well as the ternary ferroalloy FeSiC, improves chemical homogeneity after LPBF processing, with the particle size of the components playing a crucial role in dissolution behavior in LPBF.
Article
Materials Science, Multidisciplinary
Lukas Brackmann, Jannik Schuppener, Arne Roettger, Sebastian Weber
Summary: The study focuses on suppressing the phase transition from fcc to hcp in Co-based hard alloys by alloy modification to increase the stacking fault energy (SFE) of the metal matrix, leading to improved fatigue life and resistance against subcritical crack growth.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Engineering, Geological
Hongwei Yang, Joerg Renner, Lukas Brackmann, Arne Roettger
Summary: This study investigates the specimen size effect in indentation testing and the approximation of an indenter mimicking the shape of a cutter on a tunneling machine. Indentation tests were performed on cylindrical specimens of porous sandstone, and a damage zone and macroscopic vertical fracture were observed. A semi-analytical model based on cavity-expansion theory and linear elastic fracture mechanics was developed, which accurately predicts the formation of the damage zone and fracture. The model suggests that the increase in peak indentation pressure with specimen size is due to the effect of free surfaces on damage zone growth rather than fracture propagation.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Chemistry, Physical
Nick Hantke, Felix Grosswendt, Anna Strauch, Rainer Fechte-Heinen, Arne Roettger, Werner Theisen, Sebastian Weber, Jan Torsten Sehrt
Summary: Powder bed fusion of metals using a laser beam system is an important technique for industrial applications. This investigation focuses on the development of crack-free fabrication of high-performance tool steels and the analysis of laser energy input.
Article
Metallurgy & Metallurgical Engineering
P. Kronenberg, L. Wieczorek, S. L. Weber, A. Roettger
Summary: This study aims to develop an on-site metallography method to characterize carbide banding in cold-work steels using cellulose acetate film replication. It is demonstrated that grinding the sample surface with P1500 mesh SiC abrasive paper and etching it with V(2)A etchant or nitric acid for 7 minutes is sufficient for removing the matrix and leaving negative impressions of the carbides on the film. The negative replica can be studied under a reflected light microscope to characterize the carbide banding.
PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY
(2022)
Article
Materials Science, Multidisciplinary
Tarini Prasad Mishra, Lennart Leich, Martin Krengel, Sebastian Weber, Arne Roettger, Martin Bram
Summary: Electric current-assisted sintering technologies show great promise for processing NdFeB magnets, allowing for easy sintering of powders with suboptimal particle size distribution and morphology. Flash spark plasma sintering, especially when combined with external pressure, can achieve pronounced anisotropic magnetic properties. These ECAS technologies also have potential for recycling waste magnet materials and are compared to established processing technologies.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
D. R. Jantos, A. Roettger, P. Junker
Summary: In this study, the performance of topology-optimized structures compared to traditional I-beams is examined. The results show that the optimized bending beams can withstand higher loads, demonstrating the usefulness of additive manufacturing and topology optimization methods.
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2022)
Article
Metallurgy & Metallurgical Engineering
Johannes Boes, Arne Roettger, Christian Mutke, Christoph Escher, Sebastian Weber
Summary: Laser additive manufacturing techniques allow for the production of complex-shaped parts. The cold crack susceptibility of carbon-martensitic tool steels limits their processability, but substrate preheating can mitigate this issue. However, preheating may have disadvantages for part quality and powder reusability. This study investigates a carbon-martensitic steel that can be manufactured without preheating to produce parts with low crack densities.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Mechanical
P. K. Farayibi, J. Hankel, F. van Gen Hassend, M. Bluem, S. Weber, A. Roettger
Summary: This study investigates the scratch resistance of a heat-treated stainless steel densified under vacuum and a nitrogen atmosphere. It is found that the nitrogen-sintered steel sample, deep cryogenically treated, exhibits better scratch resistance due to effective load transfer between the hard phases and the matrix.
Article
Thermodynamics
L. Wieczorek, T. Katzwinkel, M. Bluem, M. Loewer, A. Roettger
Summary: This study investigates the possibility of manufacturing complex-shaped components from a carbon-martensitic hardenable cold-work steel using fused-filament fabrication and supersolidus liquid-phase sintering, demonstrating higher hardness in the heat-treated state compared to traditional materials.
HTM-JOURNAL OF HEAT TREATMENT AND MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Felix Grosswendt, Vincent Buerk, Bryan Kopanka, Sebastian Jaeger, Stefan Pollak, Lennart Leich, Arne Roettger, Marcus Petermann, Sebastian Weber
Summary: This study examines the possibility of reusing AISI D2 tool steel grinding sludge as a secondary raw material in a powder metallurgical process. The grinding sludge initially contains silicon carbide and aluminium oxide abrasive particles, as well as a cooling lubricant emulsion. A three-stage decontamination procedure is performed to remove non-metallic abrasive particles and recover the cooling lubricant oil. The prepared grinding metal chips are densified using electric discharge sintering. However, the recycled material shows different alloying composition and lower compressive strength compared to the cast reference material, due to remaining contaminations and inadequate removal of oxidic abrasive particles during the recycling process.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
W. Hagedorn, S. Jaeger, L. Wieczorek, P. Kronenberg, K. Greiff, S. Weber, A. Roettger
Summary: The steel industry accounts for 25% of all industrial greenhouse gas emissions. Besides recycling, the circular economy offers strategies to increase material efficiency and reduce the demand for primary raw materials. A case study on industrial machining illustrates how implementing various circular strategies can improve production processes and increase material efficiency. The analysis shows that the three overarching strategies of the circular economy contribute to a significant increase in material efficiency and have a positive effect on overall environmental performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Niklasf Disch, Santiago Benito, Arne Roettger, Sebastian Weber
Summary: The influence of heat treatment parameters on the carbide morphology of HS 6-5-3-8 high-speed steel was studied. Different heat treatment parameters were applied, and the carbide morphology was analyzed using computer-aided image analysis. It was found that short holding times at 550 degrees C resulted in significantly increased circularity of tungsten-rich M6C carbides, while longer holding times led to further growth of carbides without changing their circularity. Additionally, the isothermally treated material showed increased hardness.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Manufacturing
Arne Roettger, Johannes Boes, Felix Grosswendt, Sebastian Weber
Summary: This work introduces a new approach for developing defect-free components of carbon-martensitic hardenable hot work tool steel using laser powder bed fusion (L-PBF). The method is based on low transition temperature steels (LTT) with a low martensite start temperature that reduces tensile residual stresses during cooling. The modified Schaeffler diagram was used to determine an optimal alloy composition for L-PBF-processable hot work tool steels. A commercially available alloy, X38CrMo7-2, was adapted for L-PBF without preheating of the build platform. The properties of the L-PBF-processed and heat-treated steel X38CrMo7-2 were compared with the commonly used tool steel X40CrMoV5-1.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)