Article
Automation & Control Systems
Mithlesh Kumar Mahto, Adarsh Kumar, Avinash Ravi Raja, Meghanshu Vashista, Mohd Zaheer Khan Yusufzai
Summary: In this study, the friction stir welding process was used to clad a copper sheet on a mild steel substrate, covering the entire surface by multiple passes and resulting in improved grain size of the base steel. XRD analysis revealed no new phases on the top surface of the clad layer, but intermetallic compounds were identified at the interface region on the transverse cross-section.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Pingqiang Gao, Yan Zhang, Kush P. Mehta
Summary: The dissimilar joints of AA5083 and pure Cu were successfully produced and compared using friction stir spot welding and modified friction stir clinching with the intermediate layer of Zn interlayer for the first time. The presence of lamellar eutectics in the brazed zone and intermetallic compounds in the weld zone were confirmed in Cu-Al MFSC joints.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Zhikang Shen, Yuquan Ding, Wei Guo, Wentao Hou, Xiaochao Liu, Haiyan Chen, Fenjun Liu, Wenya Li, Adrian Gerlich
Summary: Refill friction stir spot welding (refill FSSW) has been shown to significantly improve weld strength in Al alloy to copper joints, with two types of continuous and ultra-thin intermetallic compounds (IMCs) layers identified at the interface. The peak temperature reached 591 degrees C, with evidence of melting and resolidification observed, showing the potential for industrial applications.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Mohamed M. Z. Ahmed, Khaled A. Abdelazem, Mohamed M. El-Sayed Seleman, Bandar Alzahrani, Kamel Touileb, Nabil Jouini, Ismail G. El-Batanony, Hussein M. Abd El-Aziz
Summary: This study investigates the feasibility of using friction stir welding (FSW) to weld duplex stainless steel (DSS) as a groove filling welding technique. Different groove designs were tested, with FSW producing defect-free joints using certain groove geometry. Compared to gas tungsten arc welding (GTAW), FSW joints exhibit higher strength and ductility.
Article
Automation & Control Systems
Dawei Zhao, Yuriy Bezgans, Nikita Vdonin, Lyudmila Radionova, Lev Glebov, Vitaly Bykov
Summary: The study investigates the impacts of welding settings on the geometry, microstructure transformation, and tensile properties of gas metal arc welded joints of weathering steel ASTM A606 type IV. It is found that all selected welding process parameters significantly affect the microstructural and macrostructural features of the welded joints as well as their tensile properties. The adjustment of welding process parameters to reduce heat input contributes to the production of acicular ferrite. Models correlating welding parameters with welding quality indexes were established and the optimal welding parameters were determined using the desirability approach.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Industrial
W. Douglas Hartley, David Garcia, Jake K. Yoder, Eric Poczatek, Joy H. Forsmark, S. George Luckey, David A. Dillard, Hang Z. Yu
Summary: Additive friction stir deposition can produce high-quality cladding without porosity even in thin substrates as thin as 1.4 mm, preserving the original strength and formability of the substrate. Despite mild global substrate distortion during cooling, the system reconfigures itself to minimize potential energy and reduce residual stress.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Michael Regev, Benny Almoznino, Stefano Spigarelli
Summary: Commercially pure titanium plates were friction-stir welded using a tool with a tungsten carbide pin. The FSWed material was defect-free and lacked WC particles. The TMAZ exhibited refined equiaxed grains, possibly due to dynamic recrystallization. The improved mechanical properties of the TMAZ were attributed to grain refinement, mechanical twinning, and increased dislocation density.
Article
Materials Science, Multidisciplinary
Zhe Liu, Zhiyu Fan, Li Liu, Shu Miao, Zhicheng Lin, Chungui Wang, Yunqiang Zhao, Renlong Xin, Chunlin Dong
Summary: In this study, 1 mm-thick AZ31 magnesium alloy sheets were joined by refill friction stir spot welding. The metallurgical features, microstructure, texture, and mechanical response of the spot-welded joints were investigated, and the effect of welding parameters on joint performance was evaluated. The results showed that the highest lap shear strength was achieved with a rotational speed of 1500 rpm and a plunge depth of 1.4 mm. A fine-grain structure was observed in the stir zone, and the grain size decreased with lower rotational speed and plunge depth. Furthermore, strain localization was observed during tensile deformation in the spot weld, and the mechanism behind this phenomenon was discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Shude Ji, Xiao Sun, Zhongwei Ma, Peng Gong, Qi Wen
Summary: Friction stir diffusion welding (FSDW) technique utilizing a specially designed tool with a turbo-like pin eliminates the undesirable hook structure in lap welding joints, leading to improved tensile lap-shear strength. By adjusting the blade number and plunge depth, the transformation between two diffusion bonding mechanisms can be achieved for higher joint strength. This novel approach provides a new method for obtaining high-quality lap welding joints.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Alessandro Tognan, Lise Sandnes, Giovanni Totis, Marco Sortino, Filippo Berto, Oystein Grong, Enrico Salvati
Summary: This paper presents a quantitative investigation on residual stress and its origin in hybrid metal and extrusion bonding (HYB). The study shows that HYB joints have higher tensile residual stress compared to friction stir welding (FSW) joints, and attributes this difference to the lower yield stress point of the filler material used in HYB. The analysis also reveals peak values of residual stress and observes transverse distortion of the welds.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Rasoul Khajeh, Hamid Reza Jafarian, Seyed Hossein Seyedein, Reza Jabraeili, Ali Reza Eivani, Nokeun Park, Yejin Kim, Akbar Heidarzadeh
Summary: The study investigated the effect of FSW parameters on the properties of 2024 aluminum alloy and copper joints, finding that the W/V ratio plays a significant role in determining the joints' characteristics. Optimal FSW conditions led to higher strength and ductility, as well as lower electrical resistivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Wentao Hou, Zhikang Shen, Nazmul Huda, Mazin Oheil, Yifu Shen, Hamid Jahed, Adrian P. Gerlich
Summary: The introduction of a cold sprayed Ni interlayer on the copper surface before friction stir butt welding of Al alloy to Cu can suppress the formation of IMCs, resulting in the generation of a single Al3Ni2 layer at the joint interface. This leads to an increase in both the tensile strength and ductility of the joint.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Behrouz Bagheri, Mahmoud Abbasi, Amin Abdollahzadeh
Summary: The study compared the microstructure and mechanical characteristics of AA6061-T6 joints produced by FSW, FSVW, and TIG. FSVW showed superior mechanical properties with finer grains in the weld region compared to FSW and TIG. The weld efficiency of FSVW was also higher than that of FSW and TIG.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Peng Zhang, Sheng-dun Zhao, Chuan-wei Zhang, Shun-lai Zang, Zheng Chen, Liang-yu Fei, Yong-fei Wang, Hong Jiang, Fan Li, Hao Zhou
Summary: Friction stir rivet welding (FSRW) is a novel method that combines mechanical interlocking and metallurgical joining to improve mechanical properties and eliminate keyhole defects in traditional friction stir spot welded (FSSW) joints. By investigating the spindle force, bonding mode, mechanical properties, and failure mode of different joints, the strengthening mechanism of FSRW method is clarified. Rivet geometry plays a crucial role in determining the mechanical properties of the joints. The combination of mechanical interlocking and metallurgical joining is assumed to be the strengthening mechanism of FSRW method.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Syahid Mohd Isa, Mohd Ridha Muhamad, Farazila Yusof, Nukman Yusoff, Zbigniew Brytan, Tetsuo Suga, Yoshiaki Morisada, Hidetoshi Fujii
Summary: This study demonstrates the potential of friction stir spot welding (FSSW) for producing highly aligned graphene configurations in copper-aluminum joints, resulting in improved mechanical and electrical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
F. Khodabakhshi, O. Ekrt, M. Abdi, A. P. Gerlich, M. Mottaghi, R. Ebrahimi, M. Nosko, G. Wilde
Summary: An advanced SPD method called accumulative fold-forging was used to produce layered nanostructured MgNi alloys with superior hydrogen storage capacity. Adjusting the structure can control hydrogen uptake and release characteristics, while refining the grain structure to the nano-scale range can further enhance hydrogen absorption capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Nazmul Huda, Namburi Hygreeva, Michel Gaudet, Anne McLellan, Adrian P. Gerlich
Summary: Zr-702 alloy was joined to 304-stainless steel using rotary friction welding, resulting in a submicron joint interface with multiple phases of zirconium, iron and nickel. Deformation twinning was observed in the Fe2Zr phase.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Guoqiang Huang, Jie Wu, Rui Yuan, Jinxue Yang, Fujun Cao, Abdelbaset R. H. Midawi, Wei Guan, Wentao Hou, Chenyang Lu, Adrian Gerlich, Yifu Shen, Fanqiang Meng
Summary: In this study, friction stir welding (FSW) was used to join alumina-forming austenitic (AFA) steel, and the microstructure evolution and mechanical properties of the resulting welds under various welding conditions were investigated. The FSW process was found to effectively prevent the formation of delta and sigma phases, resulting in favorable weld microstructures. The FSW joints exhibited higher yield strength and ultimate tensile strength compared to the base metal, particularly at low rotational speed.
MATERIALS & DESIGN
(2022)
Review
Materials Science, Multidisciplinary
Kh. Moeinfar, F. Khodabakhshi, S. F. Kashani-bozorg, M. Mohammadi, A. P. Gerlich
Summary: Additive Manufacturing (AM) is an advanced process for layer-by-layer production of engineering components, offering high quality and productivity. This review paper explores the key metallurgical phenomena, different technology routes, microstructural aspects, and functional and mechanical properties in Laser Additive Manufacturing (LAM), as well as evaluates the field's growth potential.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Nivas Ramachandiran, Hamed Asgari, Francis Dibia, Roger Eybel, Adrian Gerlich, Ehsan Toyserkani
Summary: The influence of alpha precipitate morphology on the mechanical properties of additively manufactured Ti-5Al-5V5Mo-3Cr (Ti-5553) was evaluated. It was found that the presence of non-lamellar alpha particles in the material contributed to outstanding ductility but poor impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hanwen Yang, James Chen, Nazmul Huda, Adrian P. Gerlich
Summary: Laser welding with beam wobbling was used to weld X70 pipeline steel. The effects of beam wobbling on weld surface morphology, fusion zone microstructure, and microhardness were investigated. It was found that beam wobbling suppressed spatter formation and resulted in a higher percentage of martensite in the weld metal, leading to increased hardness in the fusion zone. A softened region was also observed in the inter-critical heat-affected zone, which could be improved by increasing the welding speed.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2022)
Article
Nuclear Science & Technology
Michel Gaudet, Anne McLellan, Adrian Gerlich, Bruce Williams
Summary: Zirconium alloys are ideal materials for nuclear in-core structures due to their low neutron absorption and good performance under high neutron flux and high-temperature conditions. This study aimed to find a method to join zirconium alloys with ferrous and nickel-bearing alloys. Experimental results showed that both rotary friction welding and co-extrusion methods achieved joints with strength similar to the parent material, but lower ductility.
JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE
(2022)
Article
Automation & Control Systems
Wentao Hou, Yuquan Ding, Guoqiang Huang, Nazmul Huda, Luqman Hakim Ahmad Shah, Zhongyu Piao, Yifu Shen, Zhikang Shen, Adrian Gerlich
Summary: The study introduced eccentric motion by offsetting the pin from the tool shoulder in order to enhance material flow and grain refinement in the stir zone during friction stir welding of Al-Mg-Si aluminum alloy plates. The results showed that pin eccentricity had a positive effect on promoting material flow and grain refinement, as well as enhancing the toughness of the weld joint.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Industrial
Fujun Cao, Guoqiang Huang, Wentao Hou, Ruiyang Ni, Tao Sun, Jinpeng Hu, Yifu Shen, Adrian P. Gerlich
Summary: This paper investigates the application of submerged friction stir welding (SFSW) on SAF2507 super duplex stainless steel (SDSS). The results show that SFSW can achieve an ultrafine grained (UFG) dual-phase microstructure, leading to enhanced strength, elongation, and corrosion resistance in the weld joint.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Luqman Hakim Ahmad Shah, Wentao Hou, Mohammad Hadi Razmpoosh, Scott Walbridge, Adrian Gerlich
Summary: The paper investigates the effect of tool eccentricity on strain rate and microstructures of rapidly quenched AA6061 friction stir welds. The results show that tool eccentricity can lead to grain refinement, increased strain rates, and changes in crystallographic textures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Saadati, Mehdi Malekan, Farzad Khodabakhshi, Gerhard Wilde, Adrian P. Gerlich
Summary: This study successfully bonded a copper-based bulk metallic glass with commercial pure aluminum using dissimilar diffusion welding method, without crystallizing the metallic glass and thus avoiding deterioration of its properties.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Nivas Ramachandiran, Hamed Asgari, Francis Dibia, Roger Eybel, Ali Keshavarzkermani, Adrian Gerlich, Ehsan Toyserkani
Summary: Directional heating in metal additive manufacturing leads to an anisotropic micro-structure, causing variations in properties. This study focuses on the anisotropy of Ti-5553 alloy components produced by laser powder bed fusion. Samples printed in different orientations were tested under uniaxial tensile loading. The samples printed parallel to the building direction exhibited significantly higher ultimate strength compared to the samples printed normal to the building direction due to the presence of slip bands and transgranular fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
F. Khodabakhshi, M. H. Farshidianfar, A. P. Gerlich, A. Khajepour, V. Nagy Trembosova, M. Mohammadi, S. I. Shakil, M. Haghshenas
Summary: This study is the first to investigate the impact of processing cooling rate on phase structure and nano-scale deformation mechanisms in functionally graded stainless steels produced by directed energy deposition. Laser additive manufacturing with closed-loop feedback control was used to regulate the temperature and cooling rate of the molten pool. Comparison was made between single-track wall structures with graded microstructures produced under open-loop conditions and uniformly deposited layers with homogeneous microstructures, focusing on the microstructural aspects and nano-scale plastic deformation behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Coatings & Films
Mohsen Aliabadi, Farzad Khodabakhshi, Reza Soltani, Adrian P. Gerlich
Summary: Wear-resistant coatings are vital in various industries for prolonging component lifespan and reducing costs. NiCrBSi coatings are widely used for wear resistance and can be applied by both welding and thermal spray processes. This study investigates the effects of friction-stir processing (FSP) and furnace re-melting (FR) on the microstructure and wear properties of a NiCrBSi coating on carbon steel.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
A. Fleury, R. Ranjan, L. H. Shah, L. St-Georges, A. Rahem, S. Walbridge, A. Gerlich
Summary: This study aims to contribute to the development of performance-based quality control criteria and fatigue design provisions for friction stir welded (FSW) joints used in structural applications. Fatigue tests on thick AA6061-T6 aluminum plates fabricated using friction stir welding have been conducted under tension loading. The results show that axial misalignment defects of 10% of the plate's thickness and channel defects with the largest dimension of 9% of the plate's thickness have lower average fatigue strength compared to properly welded joints.
WELDING IN THE WORLD
(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)
