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
C. Yang, M. Q. Li, Y. G. Liu
Summary: The further refinement mechanisms of nanograins in the surface layer of TC17 subjected to severe plastic deformation via high energy shot peening were investigated in detail, revealing the abnormal face-centered cubic titanium (fcc-Ti) in nanoscale, the contribution of deformation twinning and dislocation motions, and the dominant role of extrinsic stacking faults in inducing twins in the abnormal nano fcc-Ti.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Adrien Heinzelmeier, Antoine Guitton, Marc Novelli, Wenbo Yu, Thierry Grosdidier
Summary: Ti2AlC and Ti3AlC2 are part of the MAX phases, a family of layered compounds. The study tests a composite approach to improve the brittleness of these compounds. Surface severe plastic deformation (SSPD) was conducted on a bulk MAX compound and a MAX/TiAl2 composite using surface mechanical attrition treatment (SMAT). The presence of intergranular TiAl2 effectively prevented failure in the composite, resulting in a surface hardening gradient extending down to a depth of 250 μm.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Manufacturing
C. Pradeep Raja, T. Ramesh
Summary: This article discusses the modification of microstructure in pure copper through plastic deformation at cryogenic temperature to improve its strength, ductility, and electrical conductivity. The research findings show that rolling at cryogenic temperature significantly enhances the mechanical properties and microhardness of pure copper, resulting in a good combination of electrical conductivity and formability.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Review
Materials Science, Multidisciplinary
Kaveh Edalati, Andrea Bachmaier, Victor A. Beloshenko, Yan Beygelzimer, Vladimir D. Blank, Walter J. Botta, Krzysztof Bryla, Jakub Cizek, Sergiy Divinski, Nariman A. Enikeev, Yuri Estrin, Ghader Faraji, Roberto B. Figueiredo, Masayoshi Fuji, Tadahiko Furuta, Thierry Grosdidier, Jeno Gubicza, Anton Hohenwarter, Zenji Horita, Jacques Huot, Yoshifumi Ikoma, Milos Janecek, Megumi Kawasaki, Petr Kral, Shigeru Kuramoto, Terence G. Langdon, Daniel R. Leiva, Valery Levitas, Andrey Mazilkin, Masaki Mito, Hiroyuki Miyamoto, Terukazu Nishizaki, Reinhard Pippan, Vladimir V. Popov, Elena N. Popova, Gencaga Purcek, Oliver Renk, Adam Revesz, Xavier Sauvage, Vaclav Sklenicka, Werner Skrotzki, Boris B. Straumal, Satyam Suwas, Laszlo S. Toth, Nobuhiro Tsuji, Ruslan Z. Valiev, Gerhard Wilde, Michael J. Zehetbauer, Xinkun Zhu
Summary: This article comprehensively reviews recent advances in the development of ultrafine-grained and nanostructured materials through severe plastic deformation and provides a brief history of this field. Severe plastic deformation methods have been effective in producing materials with advanced mechanical and functional properties, and the field of NanoSPD has experienced significant progress in the past two decades.
MATERIALS RESEARCH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jairo Alberto Munoz, Tarek Khelfa, Alexander Komissarov, Jose-Maria Cabrera
Summary: ECAP processing leads to grain size reduction and strength increase; grain sizes range from 0.9µm to 0.36µm; the low ductility of UFG material may be associated with a high annihilation rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Kai Zhang, Zhutao Shao, Joseph Robson, Yan Huang, Jinghua Zheng, Jun Jiang
Summary: A new cryogenic-hot forming process concept is proposed and proven to improve the ductility and fracture strength of magnesium alloys. This is achieved through effective grain refinement and texture weakening, making it a potential innovative method for producing high-performance magnesium components.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Xiangnan Pan, Guian Qian, Youshi Hong
Summary: Nanograin materials spontaneously form during ductile fracture, potentially providing a new approach for designing high ductile materials. The dominating mechanism behind this phenomenon is local severe-plastic-deformation.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Yao Jiang, Rui Cong Gu, Martin Peterlechner, Yu Wei Liu, Jing Tao Wang, Gerhard Wilde
Summary: The study investigated the impurity effect on commercial purity copper and found that lower purity materials are more prone to abnormal grain boundary migration during recrystallization.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Nirab Pant, Nisha Verma, Yinon Ashkenazy, Pascal Bellon, Robert S. Averback
Summary: This study investigates phase evolution in FCC metals with strongly interacting alloy components during severe plastic deformation through molecular dynamics simulations. Key findings include nucleation and growth of precipitates, dissolution of precipitates, a direct relationship between effective temperature and shear modulus, and the importance of cluster agglomeration during precipitate growth. The results are compared to a modified effective temperature model, providing insights into the atomic processes and their implications for inhomogeneous systems.
Article
Materials Science, Multidisciplinary
Zhe Hong, Qi Zhu, Panpan Wan, Haofei Zhou, Yuefei Zhang, Jiangwei Wang
Summary: Nanocrystalline metallic materials have different mechanical properties compared with coarse-grained counterparts due to a high density of grain boundaries contributing to plasticity, especially in thin films. However, the responses of nanocrystalline films under shear-dominant loading are not well understood. In this study, using Ag film as an example, it was found that shear-dominant loading leads to directional grain elongation and frequent formation of nanotwins across grain boundaries within the indentation region. These findings contribute to our understanding of stress-induced grain growth and provide insights into the plastic deformation of metallic nanocrystalline films under shear loading.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Fei Guo, Haipeng Dong, Weijiu Huang, Xusheng Yang, Li Hu, Mengdi Li, Luyao Jiang
Summary: The solid solution treated AA 2099 alloy was rolled with a total reduction of 80% at both room and cryogenic temperature. Nanocrystalline grain structure was observed only in the cryogenic temperature rolled sample, related to shear banding behavior. Shear banding behavior was greatly promoted by cryogenic temperature rolling and had a strong influence on mechanical homogeneity of rolled samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Andrey Volokitin, Abdrakhman Naizabekov, Irina Volokitina, Sergey Lezhnev, Evgeniy Panin
Summary: The study shows that severe plastic deformation by the HPT method plays a favorable role in increasing the degree of grain refining of AISI-316 steel, which directly benefits the mechanical properties of the material.
Article
Materials Science, Ceramics
Haiyue Xu, Ji Zou, Weimin Wang, Hao Wang, Wei Ji, Zhengyi Fu
Summary: High-pressure sintering can effectively produce dense ceramics at relatively low temperatures. Research shows that sintering densification temperature and starting threshold temperature of grain growth increase with grain size and applied pressure. Ceramics sintered under high pressure and low temperature exhibit higher grain boundary energy, residual stress, and dislocation density compared to samples sintered without additional pressure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Roberto B. Figueiredo, Kaveh Edalati, Terence G. Langdon
Summary: This study evaluates the contribution of thermally-activated creep mechanisms to the flow stress of nanomaterials processed by high-pressure torsion, and provides an explanation for the strain softening phenomenon in metals with low melting temperatures. The results confirm the significance of thermally-activated phenomena in determining the flow stress of nanomaterials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Industrial
T. Sun, M. J. Roy, D. Strong, C. Simpson, P. J. Withers, P. B. Prangnell
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2019)
Article
Nanoscience & Nanotechnology
Mehdi Razavi, Yan Huang
RECENT PATENTS ON NANOTECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Alistair Ho, Hao Zhao, Jon W. Fellowes, Filomeno Martina, Alec E. Davis, Philip B. Prangnell
Article
Materials Science, Multidisciplinary
Xinliang Yang, Jayesh B. Patel, Yan Huang, Chamini L. Mendis, Zhongyun Fan
MATERIALS & DESIGN
(2019)
Article
Materials Science, Multidisciplinary
Ebad Bagherpour, Yan Huang, Zhongyun Fan
Article
Materials Science, Multidisciplinary
Mehdi Razavi, Yan Huang
Article
Materials Science, Multidisciplinary
Kai Zhang, Jing-Hua Zheng, Yan Huang, Catalin Pruncu, Jun Jiang
MATERIALS & DESIGN
(2020)
Article
Materials Science, Multidisciplinary
A. E. Davis, J. Donoghue, J. R. Kennedy, N. Byres, P. B. Prangnell
Summary: In-situ cooling experiments were conducted on Ti64 samples for the first time, revealing the development of alpha colonies. Primary alpha laths play a crucial role in influencing subsequent colony growth and transformation process by nucleating secondary alpha laths through sympathetic autocatalysis.
Article
Materials Science, Multidisciplinary
Nicholas E. Byres, Joao Quinta da Fonseca, Christopher S. Daniel, Jack Donoghue, Alec E. Davis, Pratheek Shanthraj, Benjamin Dod, Philip B. Prangnell
Summary: During the standard ,B annealing of titanium-6% aluminum-4% vanadium (Ti64) hot-rolled plates, the evolution of abnormally coarse grain (ACG) structures is intricately linked to the texture evolution during transient heating and isothermal hold, with a particular emphasis on the importance of the rotated cube texture component and the stability of cellular microstructures. The conditions leading to the development of ACG structures are found to be associated with the high strain rate and temperature experienced at the central mid-thickness of rolled plates.
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
Materials Science, Multidisciplinary
Qinmeng Luan, Jianglong Wang, Yan Huang, Daniel S. Balint, Jun Jiang
Summary: Deformation bands (DBs) have a significant impact on grain nucleation and grain growth, with nucleated grains near DBs having orientations and positions affected by DBs. The number of nucleated grains is strongly positively correlated with the area fraction of DBs, affecting the kinetics of grain growth in the deformed microstructure. These observations suggest that the RX process is controlled by the ensemble characteristics of DBs rather than the initial grain boundaries.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
A. E. Davis, J. R. Kennedy, D. Strong, D. Kovalchuk, S. Porter, P. B. Prangnell
Summary: The study focused on characterizing the more refined primary beta-grain solidification structures and textures in components built with the novel coaxial electron beam wire DED AM (CEWAM) process. It was found that the CEWAM process changes the melt conditions to promote beta-grain nucleation ahead of the solidification front, resulting in a highly refined, equiaxed beta-grain structure. However, a mixed grain structure was commonly observed in thicker sections, requiring refinement during beta-annealing to achieve an equivalent microstructure to that seen in a standard beta-forged component.
Article
Materials Science, Multidisciplinary
Xiaohao Sun, Yue Su, Yan Huang, Minfang Chen, Debao Liu
Summary: This study investigates the effects of hot extrusion combined with multi-pass equal channel angular pressing (ECAP) on the microstructure, mechanical properties, corrosion behavior, and cell biocompatibility of Mg-based alloy and biocomposites. The results show that a fine grain structure can be achieved in the MgZnCa alloy and composites materials through six ECAP passes. The addition of beta-TCP improves the mechanical properties and cell biocompatibility. The experimental materials processed by six ECAP passes have no significant cytotoxicity to L929 cells.
Review
Crystallography
Yan Huang, Jun Jiang
Summary: A von Mises criterion states that five independent slip systems are required for polycrystals to deform uniformly and without failure. However, this criterion has fundamental flaws as there is no evidence to support the simultaneous operation of five independent slip systems. This paper reexamines the von Mises criterion and the Taylor model, and addresses the fundamental issues related to the requirement of independent slip systems and the selection of active slip systems.
Review
Materials Science, Biomaterials
Mehdi Razavi, Yan Huang
BIOMATERIALS SCIENCE
(2019)
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.
