Article
Materials Science, Multidisciplinary
YubRaj Paudel, Christopher Barrett, Shiraz Mujahid, Hongjoo Rhee, Haitham El Kadiri
Summary: Under three-point bending condition, twinning in magnesium AZ31 alloy can be analyzed based on a micromechanics model, revealing the minimum energy path of twinning evolution and the formation of twinning patterns. These results are consistent with experimental findings.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Coatings & Films
Sachin Sharma, Laurent Souqui, Henrik Pedersen, Hans Hoegberg
Summary: This study explores the chemical vapor deposition (CVD) of sp(2)-BN thin films on various cuts of sapphire substrates. The growth of crystalline films is observed on Al2O3 ( 11 2 over bar 0) and Al2O3 (0001) substrates, and the films are found to be epitaxially grown on an AlN interlayer. These findings suggest that Al2O3 ( 11 2 over bar 0) is the most favorable substrate for the envisioned applications of r-BN films.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Multidisciplinary
Yinting Zhao, Qikun Wang, Zhe Li, Danyang Fu, Gang Zhang, Jason Wu, Zhongming Ren
Summary: The low-temperature plasticity of aluminum nitride (AlN) is determined by the interaction between edge and screw dislocations. The motion and mobility of a <0001>{1(1) over bar 00} screw dislocation in a single crystal of AlN were explored through molecular dynamics simulations. The study identified four modes of thermally activated motion and compared the mobilities of different dislocations under various temperature conditions.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Yushun Liu, Jiawei Yan, Dongyue Xie, Yao Shen, Jian Wang, Guo-zhen Zhu
Summary: The article illustrates the new possibility of synthesizing periodic dislocation arrays in pure Mg under static loading conditions, providing insight into advancing dislocation substructures that enhance the performance of engineering alloys.
SCRIPTA MATERIALIA
(2021)
Article
Multidisciplinary Sciences
Yun Tan, Wei Li, Aiwen Li, Xiaofang Shi
Summary: The study found that cryorolling promotes twinning in Mg-2Y-0.6Nd-0.6Zr alloy, enhancing tensile strength and texture compared to cold rolling. The cryorolled samples exhibited a higher proportion of twin areas than cold rolled samples, indicating a significant impact of cryorolling on the microstructure and properties of the alloy.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Chong Yang, Guoguo Zhu, Bin Li, Yan Peng, Baodong Shi
Summary: The difference in mechanical behavior between fixed-end and free-end torsion is investigated in this study. The end constraint affects the strain hardening behavior, with fixed-end torsion dominated by prismatic slip and free-end torsion exhibiting two stages of strain hardening. The axial effect is sensitive to forward and reversal torsion, and the difference in axial stress under fixed-end torsion is attributed to twin growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Haoge Shou, Liuyong He, Jiang Zheng, Tianjiao Li, Lihong Xia, Dongdi Yin
Summary: Grain refinement has been found to enhance the strength and ductility of Mg alloy by promoting the activation of non-basal slip. In this study, the effect of grain size on deformation modes and heterogeneity and its relationship to crystallographic orientation were investigated. The experimental results showed that decreasing grain size increased the yield strength and elongation, with a greater effect observed in the rolling direction.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jinhua Peng, Zhen Zhang, Huanhuan Chen, Chang Long, Yong Wu, Ji'an Huang, Wei Zhou, Yucheng Wu
Summary: This study systematically investigates the texture-induced anisotropy of magnesium, showing that the microstructure, texture, and mechanical properties vary with the sample direction. Different deformation mechanisms are favored by grains at different angles, with tensile and compression yield planes being fitted by linear and exponential equations, respectively. Mechanical properties and strain hardening anisotropy are discussed through comparative analyses between experimental and calculated results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Pharmacology & Pharmacy
Kang Wang, Zhi Li, Yiming Huang, YaotianTao, Xiao Liang, Xiaoqin Chu, Ning He, Shuangying Gui, Zhenbao Li
Summary: This study investigates the influence of additives on lyotropic liquid crystal architecture using alkanes and sucrose esters. Through molecular dynamic simulations and experiments, it was shown that additives can control the structure of LLCs by changing their polarity. It was found that the polarity of additives is a key factor in determining the structure of LLCs, with a certain regularity observed in their effects on the liquid crystal structure.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Materials Science, Multidisciplinary
Quan Gao, Weitao Jia, Fangkun Ning, Hongbo Xie, Liwei Lu
Summary: In this paper, a new cyclic rotating-bending (CRB) process is proposed to improve the microstructure of extruded magnesium alloy bars. Finite element simulations are used to investigate the plastic strain distribution and evolution under different CRB processes, and the influence on the microstructure distribution is also clarified. The results show that the plastic strain in the middle radial section of the bars decreases from the surface to the core during CRB deformation, and significant twinning deformation occurs in the surface, promoting grain refinement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sunil Rawat, Nilanjan Mitra
Summary: Using molecular dynamics simulations, this study investigates the evolution dynamics of twinning in single-crystal Ti under shock loading. The activation of twin variants in single-crystal Ti follows the Schmid criterion, but the activation time varies even with equal Schmid factors. The growth rate of twins is influenced by the number of activated twin variants, indicating that twin nucleation and growth depend on the loading conditions.
PHILOSOPHICAL MAGAZINE
(2021)
Article
Materials Science, Multidisciplinary
Konstantin D. Molodov, Talal Al-Samman, Dmitri A. Molodov
Summary: Single crystal Mg deforms through cooperative twinning at room temperature, but activates prismatic slip at elevated temperatures. Dynamic recrystallization occurs within contraction twin bands that localize deformation.
Article
Environmental Sciences
Farzad Basirat, Chin-Fu Tsang, Alexandru Tatomir, Yves Guglielmi, Patrick Dobson, Paul Cook, Benoit Dessirier, Christopher Juhlin, Auli Niemi
Summary: The specialized downhole probe, SIMFIP, was used to study the coupled hydromechanical behavior of rock fractures through field experiments. The experiments revealed insights into pressure-induced fracture initiation, propagation, and shear due to hydraulic fracturing. By matching simulation results with observed data, the non-linear relationship between fracture aperture and pressure was determined, providing a better understanding of fracture behavior in crystalline rock.
WATER RESOURCES RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Yoshihito Kawamura, Fuka Shimada, Kazuma Hamade, Shotaro Ueno, Shinn-ichi Inoue
Summary: We investigated the alloy composition suitable for rapidly solidified powder metallurgy (RS PM) processing of Mg-Ca-Zn alloys and developed biomedical Mg-Ca-Zn RS PM alloys with high strength, high ductility, and high corrosion resistance. An Mg-1.0 Ca-0.5 Zn RS PM alloy with combined additions of 0.1 at% Y and 0.03 at% Mn exhibited excellent performance, surpassing previous IM alloys, with a tensile yield strength of 376 ±17 MPa, an elongation of 14.1 ±3.1 %, and a corrosion rate of 0.46 ±0.04 mm ꞏyear-1 when immersed in HBSS.
MATERIALS TRANSACTIONS
(2023)
Article
Nanoscience & Nanotechnology
H. R. Zhang, H. Z. Niu, S. Liu, M. C. Zang, D. L. Zhang
Summary: This study investigated the tensile properties and deformation mechanism of a hot-extruded powder metallurgy near alpha-Ti alloy characterized by a regular lamellar microstructure. The alloy's ultimate tensile strength (UTS) and equivalent elongation to fracture (EI) were improved by utilizing a unique micro-texture. Furthermore, annealing resulted in the formation of a bi-lamellar microstructure, enhancing the mechanical performance of the alloy.
SCRIPTA MATERIALIA
(2022)