Article
Materials Science, Multidisciplinary
Vivian Tong, Helen Jones, Ken Mingard
Summary: The plastic deformation mechanisms of tungsten carbide at different temperatures and orientations are influenced by residual defect structures, but the relationship between them is still unclear. A study using lattice rotation axis analysis can discriminate different slip modes, and the experimental observations are consistent with the model proposed in this research.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
C. Haug, D. Molodov, P. Gumbsch, C. Greiner
Summary: Tribological loading induces microstructural changes in metals through dislocation-mediated plastic deformation. Crystal lattice rotations play an important role in friction and wear at the sliding interface, and are influenced by sliding direction and grain orientation.
Article
Nanoscience & Nanotechnology
Zhongji Sun, Shao-Pu Tsai, Peter Konijnenberg, Ji-Yun Wang, Stefan Zaefferer
Summary: Most microstructure characterization tools are based on 2D observation, which is not sufficient to analyze the microstructures of metal parts fabricated by additive manufacturing (AM) due to their significant differences. Orientation microscopy-based electron backscatter diffraction (EBSD) is a quantitative technique for 2D microstructure characterization and can be extended to a powerful 3D characterization technique by combining with serial sectioning. In this study, a large-volume 3D EBSD system was used to analyze an AM-built 316L stainless steel sample, and unique tree-like grain morphologies and related textures were observed.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Christian Kurniawan, Chaoyi Zhu, Marc DeGraef
Summary: A new simulation-based pattern-matching method has been developed to retrieve the deformation tensor from electron backscatter diffraction patterns. The approach can infer the deformation state of the target pattern with an average absolute error of approximately 10(-8) for the distortion tensor under ideal conditions. It is robust against significant pattern rotation and can simultaneously optimize the pattern center with an average absolute distortion tensor error of around 10(-4) for noise-free patterns.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Feng Che, Ping Zhang, Yiyuan Meng, Zhongbing Luo, Li Lin, Vadim V. Silberschmidt
Summary: This study mainly investigates the low-cycle-fatigue damage behavior of Z2CND18.12N austenitic stainless steel at the mesoscale and its correlation with the macroscale. The variations of local misorientation in electron backscatter diffraction are found to be positively correlated with the fraction of multiple slips and maximum von Mises stress, and negatively correlated with the plastic-strain amplitude.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
J. T. Lloyd, D. J. Magagnosc, C. S. Meredith, K. R. Limmer, D. M. Field
Summary: The mechanical properties of transformation-induced plasticity (TRIP) steels are attractive in many applications, but they lose these properties under high dynamic loading rates. However, quasi-static pre-straining can significantly improve the dynamic strength of TRIP steels while retaining high work hardening response.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Mechanical
Weiya Zhang, Ming Song, Wenchun Jiang, Guangai Sun, Guangbin Shan, Mindong Chen, Yongzhong Bai
Summary: This paper investigated the fatigue failure mechanism of 2205 duplex stainless steel (DSS) and found that its fatigue strength is higher than that of single-phase stainless steel. The relationship between macroscopic fracture and microscopic deformation is clarified by measuring the kernel average misorientation (KAM), grain size, and textures of the material.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Yong-Jun Oh, Godwin Kwame Ahiale, Young-Bum Chun, Seungyon Cho, Yi-Hyun Park, Won-Doo Choi, Kizze-Hayford Ebo Anderson
Summary: The study revealed that the RAFM steel exhibits cyclic softening behavior during low-cycle fatigue tests, with the softening process divided into an initial rapid stage and a uniform softening stage, which is mainly influenced by the grain boundaries and crystal orientation of the grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xianfeng Liao, Linhan Li, Kalubi Ren, Yanlin Jia, Yong Pang, Zhu Xiao, Yanbin Jiang, Zhou Li
Summary: The effects of grain size, grain boundary type, and misorientation on the initiation of discontinuous precipitates in a Cue5Ni e1.25Si alloy are investigated in this study. It is found that smaller grain sizes result in a higher percentage of discontinuous precipitates. Only random grain boundaries are capable of initiating discontinuous precipitates, while coincident site lattice boundaries are not. There is also a difference in the initiation of discontinuous precipitates depending on the misorientation axis.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
Jorge Stella, Michael Pohl
Summary: Characterization of crystal orientation and grain boundaries is essential to understanding the mechanisms of material degradation due to exposure to erosive media. Factors such as crystal orientation, misorientation, coincidence site lattice, Schmid factor, and twin orientation play significant roles in determining local susceptibility to damage induced by cavitation. High misorientation between grains and differences in Schmid factor were identified as important factors in early damage at random grain boundaries, with twin boundaries also having a significant effect on cavitation resistance. Deviation from ideal orientations in coherent twins was also found to impact cavitation resistance.
Article
Materials Science, Multidisciplinary
S. Dourandish, M. Jahazi, G. R. Ebrahimi, L. Ebacher
Summary: This study investigated the thermodynamic and kinetic of eutectic phase formation in martensitic stainless steel ingots, revealing that forging temperature and solidification rate are the two most effective parameters influencing the volume fraction and morphology of the eutectic phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
S. Mironov, S. Zherebtsov, S. L. Semiatin
Summary: Microstructure evolution during abc deformation of commercial-purity titanium were investigated, and it was found that continuous dynamic recrystallization played a dominant role in the microstructural changes. CDRX developed preferentially at the original grain boundaries, resulting in a necklace-type microstructure. Changes in strain path led to re-organization of the pre-existing dislocation structure and essential material softening. These findings are important for understanding and controlling the microstructure of titanium materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Matruprasad Rout, Surjya K. Pal, Shiv Brat Singh
Summary: In this study, the microstructure evolution of austenitic stainless steel after deformation at elevated temperatures was investigated through thermo-mechanical processing. The results showed that at temperatures of 900 degrees C and 1000 degrees C, the microstructures of samples held for 2 seconds consisted of deformed grains, while the sample held at 1100 degrees C showed nearly complete recrystallization. The increase in holding time resulted in a decrease in low angle boundaries and an increase in high angle grain boundaries at all three temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
B. Aashranth, Dipti Samantaray, M. Vasudevan
Summary: This method proposes a new approach using viscoplastic deformation simulations to better represent microstructural features in the manufacture of austenitic stainless steel components. By connecting hot working and cold working stages, it aims to provide deeper insights into microstructural phenomena occurring during the cold working process.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Metallurgy & Metallurgical Engineering
Yaohui Song, Yugui Li, Guanghui Zhao, Haitao Liu, Huaying Li, Juan Li, Erqiang Liu
Summary: The thermal compression of 2205 duplex stainless steel was simulated using a thermal simulation testing machine, revealing different stress-strain curve behaviors at different strain rates. The study showed distinct dynamic recrystallization patterns in ferrite and austenite during deformation. Additionally, orientation distribution function analysis indicated the presence of specific textures in the microstructure of the material.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Shin-ichi Komazaki, Ryuichiro Jojima, Nanna Muraoka, Shuhei Nogami, Masayuki Kamaya, Chiaki Hisaka, Masaharu Fujiwara, Akito Nitta
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Engineering, Mechanical
Gyo-Geun Youn, Ji-Soo Kim, Yun-Jae Kim, Masayuki Kamaya
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Nuclear Science & Technology
Koji Miyoshi, Yoichi Utanohara, Masayuki Kamaya
NUCLEAR ENGINEERING AND DESIGN
(2020)
Article
Engineering, Mechanical
Masayuki Kamaya
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Mechanics
Masayuki Kamaya
ENGINEERING FRACTURE MECHANICS
(2020)
Article
Materials Science, Multidisciplinary
Masayuki Kamaya, Yohei Sakakibara, Rika Yoda, Seiichi Suzuki, Hirobumi Morita, Daisuke Kobayashi, Kenta Yamagiwa, Tomoya Nishioka, Yuya Maekawa, Tempei Tanakamaru, Hikaru Nagashima, Toshihiro Ohtani
MATERIALS CHARACTERIZATION
(2020)
Article
Nuclear Science & Technology
Koji Miyoshi, Masayuki Kamaya, Yoichi Utanohara, Akira Nakamura
NUCLEAR ENGINEERING AND DESIGN
(2020)
Article
Engineering, Multidisciplinary
Masayuki Kamaya
Summary: This study utilized the reference plastic slope (RPS) method to derive J-values for bi-linear stress-strain curves, estimating the J-values for plastic materials using simple equations and confirming that the developed equations could predict the failure load with an error within 10% in the most unconservative case.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Engineering, Mechanical
Masayuki Kamaya
Summary: The study investigated the influence of mean strain on the fatigue life of Type 316 stainless steel in a simulated pressurized water reactor primary water environment. The results showed that the presence of a 10.5 wt% martensitic phase and an increase in surface roughness from the application of mean strain did not further reduce fatigue life. The current prediction models were applicable even when mean strain or cold working was applied.
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Koji Miyoshi, Masayuki Kamaya
Summary: This study investigated the effect of loading sequence on thermal fatigue in a mixing tee and discussed the prediction method of fatigue life. The strain and fatigue damage around the hotspot were analyzed using finite element analysis and crack growth tests. The results showed that the loading sequence and overloads led to a reduction in the fatigue life and an acceleration of crack growth.
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Masayuki Kamaya
Summary: A maintenance concept of performance-based maintenance is applied to fatigue degradation of stainless steel components in a pressurized water reactor. The fatigue life and crack growth are predicted in order to optimize the inspection interval based on inspection results.
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Multidisciplinary
Shin-ichi Komazaki, Kosuke Egami, Masayuki Kamaya, Chiaki Hisaka, Akito Nitta
Summary: A new fatigue testing technique, the Small Bulge Fatigue (SBF) test, was developed and tested on damaged specimens, demonstrating the potential for detecting microcracks induced by the Disk Bending Fatigue (DBF) test.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2022)
Article
Engineering, Mechanical
Masayuki Kamaya
Summary: The dependence of fatigue strength on grain size was investigated in Type 316 stainless steel. The study aimed to clarify the underlying cause of the dependence of fatigue strength on ultimate strength, particularly in high-cycle fatigue regime. Four different heat treatments were used to obtain varying grain sizes. Results showed that larger grain sizes led to smaller ultimate strength. The strain-controlled fatigue test and crack growth test were conducted at room temperature. It was found that materials with larger grain sizes tended to have shorter fatigue lives, although grain size had minimal influence on crack growth rate. The reduced fatigue life due to larger grain sizes was attributed to an increase in initial crack size after an incubation period prior to crack initiation. It was concluded that while grain size did affect both fatigue strength and ultimate strength, it was not the dominant factor causing the dependence of fatigue strength on ultimate strength.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Proceedings Paper
Engineering, Mechanical
Masayuki Kamaya
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2019, VOL 3
(2019)
Proceedings Paper
Engineering, Mechanical
Koji Miyoshi, Masayuki Kamaya
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2019, VOL 3
(2019)
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)