Article
Materials Science, Multidisciplinary
O. Sitdikov, E. Avtokratova, M. Markushev
Summary: The study revealed that the grain refinement of Al-Mg-based alloy during multidirectional isothermal forging occurs through continuous dynamic recrystallization controlled by nanosized precipitates, resulting in the formation of (ultra) fine grain structure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Anna Bodyakova, Maksim Tkachev, Georgy Raab, Rustam Kaibyshev, Andrey N. Belyakov
Summary: The effect of severe plastic deformation through ECAE-Conform and cold rolling on the microstructures of Cu-0.1Cr-0.1Zr alloy was investigated. The results showed that an increase in ECAE-Conform strain improved grain refinement and subsequent cold rolling further led to grain size reduction and strengthening. The fraction of ultrafine grains with a size of 160 nm increased with an increase in the number of ECAE-Conform passes, resulting in a higher yield strength of above 550 MPa.
Article
Metallurgy & Metallurgical Engineering
Xiaoye Zhou, Hui Fu, Ji-Hua Zhu, Xu-Sheng Yang
Summary: In this study, the single point diamond turning technique was used to improve the mechanical properties of magnesium alloys. By refining the surface grains to the nanometer scale, the surface hardness was enhanced. Molecular dynamics simulations were conducted to study the atomic plastic deformation mechanism and the effects of different parameters. The results suggest that increasing the rake angle, cutting speed, and cutting depth can achieve better grain refinement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Automation & Control Systems
Nanyang Zhu, Chaoyang Sun, Lingyun Qian, Mingjia Wang, Xintong Li
Summary: This study proposes a new variable circular channel angular extrusion (VCCAE) process for manufacturing magnesium alloy plates with rib-web structure. The feasibility and accuracy of the process are validated through numerical simulations and experiments. The results show that stress and strain distribution in the longitudinal section is highly inhomogeneous, with significant stress concentration at the shear plane. The microstructure in the angular region is more uniform and finer, indicating that severe shear deformation induced by the angular channel promotes deformation uniformity and grain refinement.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Baisong Cheng, Fengxia Wei, Wei Hock Teh, Kok Heng Cheong, Jing Jun Lee, Li Tian Chew, Kwang Boon Lau, Tang Hieu Binh Ma, Chee Koon Ng, Pei Wang, Upadrasta Ramamurty, Cheng Cheh Tan
Summary: Hadfield steel (HS) containing 0.83 wt% carbon was manufactured using laser powder bed fusion (LPBF) with mixed Fe-Mn, pure-Fe, and Fe-C powders. The LPBF HS has superior strength and hardness compared to conventionally fabricated HS, due to the refinement in grain size and increase in dislocation density caused by rapid solidification during LPBF. Carbide formation is prevented, and the main alloying elements are retained in solution.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
A. Torkian, G. Faraji, M. S. Pedram
Summary: This study investigates the effects of grain refinement on the mechanical properties, microstructure, and in vivo degradation behavior of a WE43 magnesium alloy, aiming to develop promising biodegradable implants with superior mechanical properties and biocorrosion resistance. The results show that the two-pass ECAP and extruded sample with ultrafine-grained structure exhibit the lowest in vivo biodegradation rate and appropriate mechanical properties among the investigated samples.
Article
Metallurgy & Metallurgical Engineering
Oleg Sitdikov, Elena Avtokratova, Oksana Latypova, Michael Markushev
Summary: This study compared the structure and mechanical behavior of an Al-5Mg-0.18Mn-0.25c-0.08Zr-0.01Fe-0.01Si alloy under different deformation processes, showing that MIF resulted in ultrafine-grained structure and significantly enhanced strength and ductility after WR and CR. ECAP achieved more profound grain refinement but equal properties with MIF after WR, while CR following ECAP exhibited higher strengthening and slightly better superplastic behavior compared to MIF.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Nanoscience & Nanotechnology
Nayara Aparecida Neres da Silva, Pedro Henrique R. Pereira, Elaine Carballo Siqueira Correa, Maria Teresa Paulino Aguilar, Paulo Roberto Cetlin
Summary: Experiments were conducted to examine the flow behavior and microstructural evolution in a Zn-Al-Cu-Mg alloy processed by multi-directional forging (MDF). The alloy exhibited shear banding, twinning, work hardening, grain refinement, and flow softening in different stages of deformation. Different components in the alloy displayed various kinetics of hardening and grain refinement, with the rule of mixtures overestimating the flow stresses compared to in-situ stress-strain curve.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yandong Jing, Xuewei Fang, Naiyuan Xi, Xianlu Feng, Ke Huang
Summary: The study on the effect of laser shock peening (LSP) on 7050 aluminum alloy and 316L stainless steel revealed that no grain refinement was observed regardless of the laser cycles and energy density, but there was an increase in dislocation density. Tensile tests showed that the yield strength of both materials was improved after the LSP process, albeit sacrificing elongations. A potential method to calculate the dynamic yield stress of metallic materials was proposed with the help of the LSP process.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Xiaoyang Guo, Per Erik Vullum, Hilde J. Venvik
Summary: Combined NS-SPD and thermochemical treatment have been shown to enhance the metal dusting corrosion resistance of Incoloy 800 by increasing the effective diffusion coefficient for Cr in the alloy, leading to the formation of a highly protective oxide scale through the development of a high density of defects and ultra-fine-grained structure.
Article
Chemistry, Physical
Tae-Jin Lee, Woo-Jin Kim
Summary: Severe plastic deformation and short annealing treatment result in a partially recrystallized microstructure with small grain size in Ni-rich Ti-50.8Ni alloy. Aging treatment leads to the formation of R phase as the major phase, which contributes to excellent superelasticity and superelastic cyclability. The achievement is attributed to grain refinement, particle strengthening, and reduced critical stress for stress-induced martensite transformation due to the presence of R phase.
Article
Materials Science, Multidisciplinary
Ren-E Dong, Amir Hossein Assari, Saeid Yaghoobi, Maryam Mahmoodi, Sahar Ghaderi
Summary: This study examined the microstructure evolution and thermal properties of Al/Ti composites with different volume fractions of Ti. The results showed that plastic instabilities occurred within the composites, leading to a uniform distribution of Ti fragments in the Al matrix. The grain size of the composites decreased with an increase in Ti content, indicating a gradient in grain size. Furthermore, the thermal properties of the composites increased with temperature but decreased with an increase in passes. However, the thermal conductivity, thermal diffusivity, coefficient of thermal expansion, and specific heat capacity of the composites decreased with an increase in Ti content.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Keer Li, W. Chen, G. X. Yu, J. Y. Zhang, S. W. Xin, J. X. Liu, X. X. Wang, J. Sun
Summary: Deformation kinking, an uncommon plastic deformation mechanism, was investigated in Ti-11 V metastable beta-Ti alloys through severe plastic deformation using cold forging. The study revealed the microstructure evolution and grain refinement behavior during deformation kinking. It was found that the formation of kink bands goes through dislocation gliding, pre-kinking, and the ripening of pre-kinks. The resulting grain refinement involves transverse breakdown and longitudinal splitting of dislocation walls and cells. Nanograins with a diameter of approximately 15 nm were produced at a large strain of 1.2. The study also showed that nanocrystallization is highly localized inside kink bands while the outer microstructure maintains original coarse structures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Sijia Wang, Guoliang Xie, Jie Yang, Feixiang Liu, Xinhua Liu
Summary: Grain refinement in a nano-scaled Al2O3 dispersion-strengthened Cu alloy occurs during compression distortion. The plastic deformation mechanism of the alloy is investigated by studying the evolution of grain size, dislocation density and distribution, and texture orientation. The compression process is divided into four stages, and the grains split into refined sub-grains due to the pinning effect of nano-scaled Al2O3 particles. The study provides insights into the strengthening mechanism and guidance for the design of Cu alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Parastoo Mahmoud Kalayeh, Mehdi Malekan, Ahmad Bahmani, Mehrab Lotfpour, Seyed Mahmood Fatemi, Soraya Bornay Zonoozi
Summary: In this study, low corrosion rate magnesium alloy was achieved through various processing techniques including solution treatment, multi-directional forging (MDF), and post-annealing. The combination of these processes resulted in improved corrosion resistance and mechanical properties of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Basanth Kumar K., Kuldeep K. Saxena, Suhash R. Dey, Vivek Pancholi, Amit Bhattacharjee
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Engineering, Multidisciplinary
Rahul Gupta, G. P. Chaudhari, B. S. S. Daniel
COMPOSITES PART B-ENGINEERING
(2018)
Article
Chemistry, Physical
K. K. Saxena, K. S. Suresh, R. V. Kulkarni, K. V. Mani Krishna, V. Pancholi, D. Srivastava
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Engineering, Industrial
Rahul Kumar, V. Pancholi, R. P. Bharti
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2018)
Article
Nanoscience & Nanotechnology
Neeraj Srivastava, G. P. Chaudhari
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Nanoscience & Nanotechnology
A. Raja, P. Biswas, V Pancholi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Engineering, Mechanical
Brij Kishor, G. P. Chaudhari, S. K. Nath
TRIBOLOGY INTERNATIONAL
(2018)
Article
Materials Science, Multidisciplinary
Yashwant Mehta, S. K. Rajput, G. P. Chaudhari, Vikram V. Dabhade
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2018)
Article
Materials Science, Multidisciplinary
Neeraj Srivastava, G. P. Chaudhari
MATERIALS SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Sumit Kumar, G. P. Chaudhari, Sumeer K. Nath
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Brij Kishor, G. P. Chaudhari, S. K. Nath
MATERIALS TODAY-PROCEEDINGS
(2018)
Proceedings Paper
Engineering, Civil
N. Srivastava, R. Gupta, G. P. Chaudhari
INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MECHANICAL AND CIVIL ENGINEERING
(2018)
Proceedings Paper
Engineering, Civil
Y. Mehta, S. K. Rajput, G. P. Chaudhari, V. V. Dabhade
INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MECHANICAL AND CIVIL ENGINEERING
(2018)
Proceedings Paper
Engineering, Civil
Yashwant Mehta, Gajanan P. Chaudhari, Vikram V. Dabhade
INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MECHANICAL AND CIVIL ENGINEERING
(2018)
Proceedings Paper
Engineering, Civil
Rahul Gupta, G. P. Chaudhari, B. S. S. Daniel
INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MECHANICAL AND CIVIL ENGINEERING
(2018)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)