Article
Materials Science, Multidisciplinary
Debasis Poddar, Appa Rao Chintha, Bhagyaraj Jayabalan, Basudev Bhattacharya, Chiradeep Ghosh, Vivek Kumar Singh
Summary: This study investigates the effect of low-temperature annealing treatment on two severely cold rolled ultra-high-strength steels. It is found that the cold rolling process enhances the stability of retained austenite and increases the dislocation density in martensitic and bainitic steels, leading to improved yield strength and ultimate tensile strength. Carbon partitioning at the dislocation sites also plays a role in increasing the mechanical properties during low-temperature annealing.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Jun Zhang, Mingxin Huang, Binhan Sun, Boning Zhang, Ran Ding, Cheng Luo, Wu Zeng, Chi Zhang, Zhigang Yang, Sybrand van der Zwaag, Hao Chen
Summary: The effect of Lfiders banding on hydrogen embrittlement susceptibility of medium Mn steels was investigated by varying the degree of yield point elongation. It was found that steels with a larger YPE were more susceptible to hydrogen embrittlement. The presence of Lfiders banding and localized deformation play a key role in influencing the overall hydrogen embrittlement susceptibility of medium Mn steels.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Bo Xiao, Haokai Dong, Tao Yang, Shaofei Liu, Shenbao Jin, Boxuan Cao, Yongdian Han, Lei Zhao, Xiawei Yang, Gang Sha, Lianyong Xu
Summary: We present two typical morphologies (elongated- and blocky-shaped) of the Laves phase in tempered martensite ferritic steels during creep process, which are formed through two independent paths: grain boundaries and neighboring M23C6. The presence of multi-element segregation (Cr, Mn, Si, and W) at grain boundaries and adjacent M23C6 provides a source of Laves phase formation. Additionally, different growth mechanisms play crucial roles in the formation of these two morphologies. Our findings enhance the understanding of Laves phase heterogeneous precipitation and offer insights for the development of novel heat-resistant steels with superior creep strength.
MATERIALS RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Thierry Auger, Bassem Barkia, Eva Heripre, Vincent Michel, Denis Mutel, Ivan Guillot, Zehoua Hamouche, Liliana Medina-Almazan
Summary: This study investigates the liquid metal embrittlement behavior of three austenitic steels with increasing nickel content in liquid mercury. It is found that only the low nickel alloys are susceptible to embrittlement. The crack path of austenitic steel fracture induced by liquid mercury is elucidated at the microstructural scale, with deformation induced martensite formation and the presence of alpha'/alpha' interfaces identified as key factors contributing to embrittlement. The results highlight the importance of alpha' phase formation in unstable austenitic steels during plastic strain in determining the sensitivity to liquid metal embrittlement.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Hamid Azizi, Javad Samei, Hatem S. Zurob, David S. Wilkinson, David Embury
Summary: An ultrafine-grained dual phase microstructure has been achieved in a steel by controlling the composition and deformation gradients. This strategy enables the development of dual phase steels with tailored properties and excellent mechanical performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hao Peng, Yixin An, Bingfeng Wang
Summary: The equiatomic TiZrV medium-entropy alloy with diphasic heterostructure shows great potential for structural applications, and its mechanical properties can be improved through precipitation strengthening and high-density dislocation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
B. Z. Long, Y. Zhang, C. H. Guo, Y. Cui, L. X. Sun, D. Chen, F. C. Jiang, T. Zhao, G. Zhao, Z. W. Zhang
Summary: Cu-rich nano-precipitate strengthened steel exhibits excellent dynamic mechanical properties and deformation resistance, showing outstanding impact resistance and delayed fracture performance at high strain rates, while effectively hindering the formation of adiabatic shear bands.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Yuzhe Wang, Jian Chen, Rengen Ding, Weili Wang, Jiahua He, Xueyang Zhou
Summary: The effect of cold rolling on the microstructural evolution and mechanical properties of a novel high entropy alloy (Fe50Mn30Co10Cr10)97C2Mo1 was investigated. The results show that cold rolling increases the dislocation density, decreases the width and spacing of deformation twins, and increases the volume fraction of shear bands. This microstructural evolution leads to an increase in yield strength and a decrease in ductility of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Paulo M. O. Silva, Mucio C. C. Filho, Jose A. da Cruz, Antonio J. M. Sales, Antonio S. B. Sombra, Joao Manuel R. S. Tavares
Summary: This article examines the effect of cold rolling and deformation on the pitting corrosion resistance of AISI 301LN and 316L stainless steels. The study combines various techniques to analyze the microstructures and conducts corrosion tests according to ASTM standards. The results show that the increase in cold rolling reduction leads to a higher content of martensite. The 316L steel demonstrates better pitting corrosion resistance due to its higher molybdenum content, while the 301LN steel is more susceptible to deformation-induced martensite formation.
Article
Nanoscience & Nanotechnology
Sang Guk Jeong, Gangaraju Manogna Karthik, Eun Seong Kim, Alireza Zargaran, Soung Yeoul Ahn, Man Jae Sagong, Suk Hoon Kang, Jung-Wook Cho, Hyoung Seop Kim
Summary: This study demonstrates a new method of controlling microstructures through selective laser melting, developing materials with heterogeneous structures and achieving an excellent combination of strength and ductility. The research provides a new direction for producing heterostructured materials with enhanced strength and ductility in metal additive manufacturing.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Shilong Liu, Bin Hu, Wei Li, R. D. K. Misra, Xuejun Jin
Summary: Research shows that in ultra-high strength steels, the formation of nanoscale twinned martensite and retained austenite after intercritical annealing and rapid quenching significantly enhances the uniform elongation of the material without compromising ultimate tensile strength.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Qingwen Guan, Wenjun Lu, Binbin He
Summary: Advanced high strength steels (AHSS) are developed to reduce vehicle weight without sacrificing passenger safety. The incorporation of austenite in AHSS with carefully designed alloying elements and thermo-mechanical processing is crucial for enhancing the strain hardening behavior. Three different plasticity modes including dislocation plasticity, martensitic transformation, and deformation twinning can be observed in the austenite grains during small-scale tests, depending on stacking fault energy and crystal orientation. The remaining issues regarding the nano/micro-mechanical behavior of austenite in AHSS are discussed, aiming to shed light on the development of new high-performance steels at low cost.
Article
Computer Science, Artificial Intelligence
Hendrik Hotz, Benjamin Kirsch, Jan C. Aurich
Summary: Machining metastable austenitic stainless steel with cryogenic cooling induces a deformation-induced phase transformation from gamma-austenite to alpha'-martensite in the subsurface, resulting in higher microhardness and improved fatigue and wear resistance. Increasing passive forces and cutting forces promote the phase transformation, while higher temperatures inhibit it, with feed force having no significant influence. Proposed models allow for estimating alpha'-martensite content during cryogenic turning using in-situ measurement of process forces and temperatures.
JOURNAL OF INTELLIGENT MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Ersoy Erisir, Ozge Ararat, Oguz Gurkan Bilir
Summary: This study investigated the influence of initial microstructure on the final microstructure and wear performance of bearing steels. It was found that martensitic and bainitic initial microstructures can significantly reduce the size of carbides in the final microstructure, resulting in higher hardness and outstanding wear resistance.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yu Gamin, Jairo Alberto Munoz Bolanos, A. S. Aleschenko, A. A. Komissarov, N. S. Bunits, D. A. Nikolaev, A. Fomin, V. V. Cheverikin
Summary: The semi-finished products from a Cu-Ni-Cr-Si alloy are produced for electrical purposes through radial-shear rolling (RSR) and heat treatment, resulting in improved mechanical properties and electrical conductivity. The alloy is thermally hardened after heat treatment due to the precipitation of fine inclusions uniformly distributed in the sample volume, leading to enhanced mechanical properties and electrical conductivity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.