Article
Nanoscience & Nanotechnology
Lu Jiang, Katrin Mester, Robert Knott, Kathleen Wood, Anna Sokolova, Timothy Langan, Matthew Barnett, Thomas Dorin
Summary: This study investigates the impact of Sc and Zr on the precipitation kinetics in an Al-Cu-Li alloy without pre-stretching. In-situ Small-Angle X-ray Scattering (SAXS) and hardness measurements are used to analyze the precipitation kinetics. The presence of Al3(Sc, Zr) dispersoids accelerates the precipitation kinetics significantly. Surprisingly, TEM reveals the absence of T1 precipitates in the peak aged condition, and APT and DFT calculations suggest that the Al3Zr-shell acts as preferred heterogeneous nucleation sites for 0 ' precipitates.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Mingdong Wu, Daihong Xiao, Xinkai Wang, Lanping Huang, Wensheng Liu
Summary: The effects of Zn contents on the mechanical properties, corrosion behaviors, and microstructural evolution of extruded Al-Li-Cu-Mg-Ag alloys were investigated. Increasing Zn contents can accelerate hardening kinetics, improve hardness, and enhance corrosion resistance. The addition of 0.57 wt.% Zn to the alloy showed the best combination of tensile strength and corrosion resistance.
Article
Materials Science, Multidisciplinary
Yichang Wang, Lingfei Cao, Xiaodong Wu, Xiaomin Lin, Tianyu Yao, Liming Peng
Summary: In this study, the effects of minor Ti, Mn, Cr, Zr, and Er additions on cast Al-Zn-Mg-Cu alloys were investigated. The addition of Ti significantly refines the ingot grains, while Mn and Cr additions reduce impurities and form specific phases. The joint addition of Ti, Mn, Cr, Zr, and Er creates a bulk composite phase. The alloy with the joint addition of these elements exhibits the highest hardness due to collaborative strengthening effects.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Bo Jiang, Shichen Li, Fuhua Cao, Renguo Song, Xiaoou Yi
Summary: The newly discovered Al5Cu6(Li, Mg)2 phase exhibits excellent heat resistance potential and can improve the thermal stability of the alloy, with a lower energy cost.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Kai Ling, Wenfeng Mo, Pan Deng, Junwei Chen, Binghui Luo, Zhenhai Bai
Summary: The hot deformation behavior of the Al-4.96Cu-0.96Mg-0.63Ag-0.57Mn-0.13Zr-0.02Ti alloy was studied by conducting hot compression experiments. The flow stress of the alloy decreases with increasing temperature and decreasing strain rate. The highest stress is reached at a large strain due to the difficulty of the dynamic softening effect to offset the work hardening caused by high-density dislocations. The optimal processing parameters region exhibits dynamic recrystallization as the dominant softening mechanism.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhiping Wang, Qingqing Pu, Yugang Li, Peikang Xia, Jiwei Geng, Xianfeng Li, Mingliang Wang, Dong Chen, Haowei Wang
Summary: The effects of combined Ti and Zr addition on the microstructures and mechanical properties of Al-Zn-Mg-Cu alloy were investigated. The results show that the addition of Ti and Zr promotes the precipitation of nano L12 Al3(Ti,Zr) dispersoids. However, the presence of primary D022 Al3Ti and Al3(Ti,Zr) phases reduces both the strength and ductility. The addition of minor Ti and Zr elements provides a simple approach to improve toughness and reduce cost in developing high-strength Al alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Morteza S. Ardakani, S. L. Kampe, Jaroslaw W. Drelich
Summary: This study investigates the microstructure and tensile properties of three different Zn-xCu-yMn-0.05Mg alloys. The results show that the dissolution of secondary phases and grain coarsening can effectively suppress strain softening and strain rate sensitivity. Additionally, adjusting the fraction of secondary phases and grain size can eliminate the effect of dynamic recrystallization on the alloys. The formulated alloys exhibited good thermal stability and were not susceptible to natural aging.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yuxin Dai, Liangming Yan, Jianpeng Hao
Summary: The intermetallic phase evolution during homogenization of an Al-Zn-Mg-Cu-Zr-Nd alloy was investigated. The addition of Nd affected the dissolution and transformation of different phases, leading to the formation of stable intermetallic phases. Homogenization kinetics analysis determined the optimal homogenization conditions for the alloy.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Shujuan Liu, Zihao You, Zhi Zhang, Tengfei Zhao, Xiaobo Zhang, Ruizhi Wu
Summary: A high-performance Mg-10Gd-4Dy-1.5Ag-1Zn-0.5Zr (wt.%, EQ142X) alloy was designed using multi-element composite addition, resulting in high yield strength (approx. 396 MPa) and ultimate tensile strength (approx. 451 MPa) after hot extrusion and ageing. The high strength is attributed to fine grains and nano-precipitates, especially beta' and gamma nano-precipitates, which act as the main strengthening phases. The introduction of nano-precipitates network into the fine-grained structure is proposed as an effective strategy for developing high-strength Mg alloys.
Article
Materials Science, Multidisciplinary
Lei Li, Huanzheng Jiao, Congfu Liu, Lin Yang, Yusong Suo, Ruixue Zhang, Tie Liu, Jianzhong Cui
Summary: The addition of multiple trace elements significantly alters the microstructures, mechanical properties, and corrosion behavior of zinc alloys. The extruded ZM-0.35Li alloy demonstrates the best comprehensive mechanical properties and corrosion resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yiming Chen, Hao Lv, Yunxuan Zhou, Hong Yang, Quan Dong, Xiaoying Qian, Yi Lin, Jun Tan, Xianhua Chen, Bin Jiang, Fusheng Pan
Summary: The low-cost Mg-10Zn-1Al-0.5Cu-0.3Mn alloy was successfully fabricated by a rapid-setting water-cooling method, and the addition of MgCO3 can decrease the average grain size of the alloy. The alloy with MgCO3 addition showed higher ultimate tensile strength and elongation in the solid solution state. The formation of MnAl2O4 phase with a strong interface with the Mg matrix phase was observed.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Yunlong Ma, Yuanchun Huang, Xieyi Zhang
Summary: The study focused on the precipitation thermodynamics and kinetics of the second-phase in the quenched Al-Zn-Mg-Cu-Sc-Zr-Ti alloy. It was found that the eta' phase is the dominant strengthening phase, although it can increase electrical conductivity at high temperatures, it also reduces hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Zhen Wei, Jinghuai Zhang, Rirong Bao, Ruizhi Wu, Hao Zhang
Summary: The strength of Mg-8.5Li-7.5Zn-1.5Y alloy is significantly enhanced through simple heat treatment. The yield strength increment of 173 MPa is rarely reported in Mg alloys. The formation of abundant needle-shaped α-Mg precipitates uniformly distributed in the β-Li matrix is mainly responsible for the remarkable improvement in yield strength. This new finding is expected to contribute to the design of high-performance Mg-Li alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Qingyuan Xing, Xiaohui Wu, Jinxin Zang, Linggang Meng, Xingguo Zhang
Summary: This study explores the influence of Er addition on the microstructure, type transformation of second phases, and corrosion resistance of an Al-Zn-Mg-Cu alloy. The results reveal that Er element can effectively refine the alloy grains and change the composition of second phases at the grain boundary, thus significantly enhancing the corrosion resistance of the alloy. After solution treatment, the formation of Al8Cu4Er phase, in interaction with Cu element, evidently lowers the corrosion rate of the alloy.
Article
Materials Science, Multidisciplinary
Martin Vlach, Jakub Cizek, Veronika Kodetova, Tomas Kekule, Frantisek Lukac, Miroslav Cieslar, Hana Kudrnova, Lucia Bajtosova, Michal Leibner, Petr Harcuba, Jaroslav Malek, Volkmar Neubert
Summary: The precipitation reactions of Al-3.4% Mg-2.7% Zn-0.80% Cu-0.10% Fe-0.05% Si alloy with and without Sc and Zr additions were investigated. The addition of Sc and Zr microalloying elements resulted in substantial grain refinement and the formation of secondary Al-3(Sc,Zr) particles, improving the thermal stability of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2021)
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)