Article
Materials Science, Multidisciplinary
G. El-Garhy, N. El Mahallawy, M. K. Shoukry
Summary: Cyclic extrusion compression (CEC) is an effective fabrication process for producing fine, ultrafine grains with superior physical and mechanical properties. The CEC process applied on Al alloy 6061 and its SiCp composite resulted in reduction of grain size, porosity, SiC particle size, increase in hardness, decrease in wear rate and slightly reduced coefficient of friction. Notably, significant improvement in wear resistance was observed in the composite samples, especially in Al 6061 10 wt. % SiC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
L. Fu, C. Yang, R. Wei, X. Pei, J. Teng, D. Kong, Y. Lu, Y. Guo, T. Liu, Y. Hu, B. Yin, Z. Zhang, A. Li, L. Wang, X. Han
Summary: This study investigated the atomic-scale deformation process of AuCu nanowires with a size of 16 nm for the first time, revealing superplasticity and high strength at room temperature. The observed superplasticity was found to originate from continuous full dislocation activities and other factors, differing from previous studies on pure metals.
MATERIALS TODAY NANO
(2021)
Article
Nanoscience & Nanotechnology
Abhinav Parakh, Andrew C. Lee, Stella Chariton, Melody M. Wang, Mehrdad T. Kiani, Vitali B. Prakapenka, X. Wendy Gu
Summary: Precipitate-matrix interactions govern the mechanical behavior of precipitate strengthened Al-based alloys. We studied the high-pressure behavior of Al7075 alloy separately from the high strain-rate behavior. High pressure can significantly enhance the strength of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hai Zhang, Zhiyan He, Wenbin Gao
Summary: The effect of severe plastic deformation on microstructure and hardness of 7075 aluminum alloy sheet differed from that of thick samples. Grain refinement was not significant, but precipitation phases MgZn2 were dissolved in the matrix near the surface. Varying densities of dislocations were formed at different depths. The depth of severe plastic deformation layer was 40-70 μm, while the affected depth of hardness was much deeper. The maximum hardness enhancement, a 16% increase compared to the core hardness, occurred at a depth of approximately 150-250 μm below the surface. The change in hardness depended on the competition between precipitation dissolution and dislocation multiplication.
Article
Nanoscience & Nanotechnology
A. Navabi, M. Vandadi, T. Bond, V Rahneshin, J. Obayemi, R. Ahmed, J. E. Oghenevweta, V Champagne, N. Rahbar, W. O. Soboyejo
Summary: This paper investigates the deformation and cracking phenomena related to the cold spray of 6061 Al alloy powders with nanoscale surface oxide layers. Through experimental and simulation methods, the characteristics and mechanisms of these phenomena are thoroughly explored. The research findings are of great significance for the design of cold spray processes and the fabrication and repair of material structures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xi Shu, Xinyu Liang, Jinglin Liu, Qi Wen, Long Wan
Summary: The severe plastic deformation (SPD)-induced rapid diffusion joining method is used to increase the Al/Fe diffusion rate at short time and low temperature, achieving reliable metallurgical bonding. The local stress and strain caused by SPD results in refined crystal grains and high concentrations of dislocations, facilitating the rapid diffusion of Fe atoms to the Al interface region. The diffusion rate of the interface layer is 103 times faster than the thermal activation diffusion state. The short-term and low-temperature characteristics of this method can be extended to other solid-state welding methods.
Article
Nanoscience & Nanotechnology
MingDa Zhang, JingXia Cao, Ting Li, ZhanJiang Zhai, Nan Sui, Rongguang Jia, Xu Huang
Summary: This study closely analyzed the local area plastic deformation and dislocation characteristics of the Ti-6Al-2Sn-4Zr-2Mo-0.1Si alloy under low-cycle fatigue and dwell fatigue at room temperature. The results showed inhomogeneous plastic deformation occurred in local areas in the equiaxed primary alpha-phase and the transformed beta-phase. Bands of dislocations were found in some equiaxed primary alpha-grains related to the arrangement direction of alpha+beta colonies in the transformed beta-phase and the crystallographic orientation of the primary alpha-phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Seyed Elias Mousavi, Ali Sonboli, Mahmood Meratian, Mohabbat Amirnejad, Seyed Hadi Mohamadi Azghandi, Paul Munroe
Summary: The study shows that low stacking fault energy alloys processed by ECAP can achieve unexpected mechanical properties, with high ductility reaching up to -80% while maintaining good tensile strength. The investigation of alloy microstructure reveals a combination of deformation mechanisms, including slip and twinning, accompanied by grain boundary serration and grain fragmentation. These deformation modes trigger the unexpected mechanical properties in this alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yan Huang, Jun Jiang
Summary: Research has shown that in an Al-0.1Mg single-phase aluminum alloy, after equal channel angular extrusion, the minimum grain size reached during plane strain compression at low temperatures cannot be further reduced, leading to the formation of a microstructure with thin ribbon grains. It has also been found that a high boundary migration rate is required to maintain a constant boundary spacing, which exceeds the rate justified by conventional diffusion-controlled grain growth.
Article
Chemistry, Physical
E. A. Naumova, S. O. Rogachev, R. Sundeev
Summary: High-pressure torsion (HPT) was used to study the influence on phase composition, structure, and properties of Al-18% Ca alloy containing Al4Ca intermetallic. Results show that even after 5 turns of HPT, the additional hardening does not exceed 30-40 HV. The Al4Ca intermetallic undergoes noticeable plastic deformation with subgrain sizes predominantly in the range of 10-50 nm.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Zhibo Liu, Yaojun Lin, Zhigang Yan, Manping Liu, Xiaochun Liu, Jiani Sun, Hans J. Roven
Summary: In this study, a strategy of strengthening Al-10wt%Mg binary alloy via heavy cryogenic rolling at liquid nitrogen temperature was proposed. The combination of cryogenic plastic deformation and a high concentration of Mg solute effectively enhanced the strength and ductility of the alloy, providing a new avenue for non-age-hardened Al-Mg alloys to achieve ultrahigh strength and good ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Hao Wu, Meng Huang, Xuewen Li, Yiping Xia, Zhi Wang, Guohua Fan
Summary: The study proposed a new heterogeneous laminated/gradient integrated strategy to improve material performance. Results demonstrated that the stress-bearing constituents gradually transition from Ti(Al) to TiBw/Ti layers as the temperature decreases, leading to temperature-dependent reversed fracture behavior.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Physical
Dong Sun, Shuyong Jiang, Yanqiu Zhang, Bingyao Yan, Junbo Yu
Summary: Equiatomic NiTi shape memory alloy subjected to severe plastic deformation through local canning compression exhibits different twin structures after solution treatment and subsequent annealing, which significantly influence the phase transformation behavior of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
T. Hryhorova, N. Isaev, S. Shumilin, P. Zabrodin, D. Drozdenko, K. Fekete, O. Davydenko
Summary: The plastic deformation behavior of Al-3.8 at.% Li polycrystals processed by equal-channel angular hydroextrusion (ECAH) was investigated in the temperature range of 4.2-400 K. The microstructure evolution during loading was studied using electron backscatter diffraction (EBSD), revealing changes in grain orientations and dislocation density. With decreasing temperature, the plasticity and strength of the polycrystals increased due to a decrease in dislocation annihilation and an increase in strain hardening rate as a result of reduced atom mobility. The activation volume (Va) showed a nonmonotonic dependence on temperature, with a maximum value at 180 K, indicating a complex deformation mechanism involving thermally activated processes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Alina Y. Morkina, Rita I. Babicheva, Elena A. Korznikova, Nariman A. Enikeev, Kaveh Edalati, Sergey V. Dmitriev
Summary: Molecular dynamics simulations were used to study the mechanical dissolution of Zr in Al. The orientation of the grain boundary was found to affect the mixing efficiency of alloy components, with a normal orientation promoting better dissolution of Zr.
Article
Materials Science, Characterization & Testing
H. Hizli, C. Hakan Gur
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2017)
Article
Materials Science, Characterization & Testing
H. Hizli, C. Hakan Gur
RESEARCH IN NONDESTRUCTIVE EVALUATION
(2018)
Article
Engineering, Mechanical
G. Gurer, C. H. Gur
ENGINEERING FAILURE ANALYSIS
(2018)
Article
Engineering, Mechanical
Burak Ozcan, Goksu Gurer, Cemil H. Gur
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Physics, Fluids & Plasmas
Mustafa Karagoz, Anil Civil, Baran Yildirim, Emre Burak Yurdakul, Emre Durna, Evren Tan, Ozgur Cavbozar, Ulas Gocmen, Yasin Cevik
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2020)
Article
Instruments & Instrumentation
T. Kaleli, C. Hakan Gur
Article
Materials Science, Multidisciplinary
Amirhossein Mashhuriazar, Hamid Omidvar, C. Hakan Gur, Zainuddin Sajuri
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Materials Science, Multidisciplinary
Muhammad Junaid Aslam, Cemil Hakan Gur
Summary: In this study, a series of creep rupture tests were conducted on P91 steel specimens within a specific stress and temperature range, leading to the derivation of empirical equations through analyzing the relationships between various creep parameters.
KOREAN JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Amirhossein Mashhuriazar, C. Hakan Gur, Zainuddin Sajuri, Hamid Omidvar
Summary: The study investigates the economic method of fusion welding for repairing damaged components of a gas turbine, focusing on the effects of heat input, pass number, and layer number on intergranular liquation cracking of IN-939 during tungsten arc welding. Results show that these factors significantly influence the microstructure and liquation cracking of the heat-affected zone (HAZ).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Amirhossein Mashhuriazar, Mohammadhassan Badihehaghdam, C. Hakan Gur, Murat Tolga Erturk, Caner Batigun, Suha Tirkes, Zainuddin Sajuri, Hamid Omidvar
Summary: This study investigated the effects of TIG repair welding on the microstructure, mechanical properties, and corrosion resistance of Inconel 939. The results showed that hardness and corrosion resistance decreased in the heat-affected zone and fusion zone due to decreased gamma' phase, liquation cracking, and dislocation accumulation. Furthermore, hot corrosion tests revealed changes in the base metal but not in the weldment, with the formation of a brittle oxide layer on the surface. TIG welding had limited effects on the yield strength and elongation of the material.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Amirhossein Mashhuriazar, Hamid Omidvar, Zainuddin Sajuri, C. Hakan Gur, Amir Hossein Baghdadi
Article
Instruments & Instrumentation
S. Caliskan, C. Hakan Gur
Proceedings Paper
Metallurgy & Metallurgical Engineering
Huseyin Hizli, C. Hakan Gur
RESIDUAL STRESSES 2018, ECRS-10
(2018)
Review
Materials Science, Multidisciplinary
C. Hakan Gur
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2018)
Proceedings Paper
Nanoscience & Nanotechnology
C. Hakan Gur
CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS 2017
(2017)
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)
