Article
Nanoscience & Nanotechnology
Zhirou Zhang, Qinghuan Huo, Zhenyu Xiao, Yuxiu Zhang, Aki Hashimoto, Xuyue Yang
Summary: The study proposed a practical method for optimizing the mechanical properties of Mg-4Y-2Nd-0.2Zn-0.5Zr alloy by combining interrupted compression with intermediate annealing, resulting in the formation of deformation bands triggered by the intermediate annealing and a higher volume fraction of ultra-fine grains in the final IC sample compared to the CC sample.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Si-shu Wang, Qian-hao Zang, Hong-mei Chen, Yu-hang Guo, Feng-jian Shi, Di Feng
Summary: The Mg-1Gd-0.75Er-0.5Zn-0.18Zr (at.%) alloy with LPSO phase was prepared by metal mold casting and hot extrusion. The samples showed a bimodal microstructure, and the annealed samples had different fractions of equiaxed grains. The extrusion temperature affected the percentage of fine grains and the presence of LPSO phase, which influenced the tensile properties of the Mg alloys.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Partha Duley, Souriddha Sanyal, T. K. Bandyopadhyay, Sumantra Mandal
Summary: In this study, annealing treatments were conducted on magnesium alloys forged at different temperatures. The specimens forged at 573 K and subsequently annealed at 623 K for 5 min exhibited a better combination of tensile properties compared to the other specimens, attributed to the unique grain size heterogeneity and the presence of finer and coarser second phase particles.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Shiyang Liu, Hongyi Zhan, Damon Kent, Qiyang Tan, Yu Yin, Nghiem Doan, Chang Wang, Matthew Dargusch, Gui Wang
Summary: This study investigates the impact of Mg additions on the deformation behaviors and dynamic recrystallization mechanisms of Zn-Mg alloys during room temperature compression. Low Mg content alloy exhibited continuous and twin-induced dynamic recrystallization, resulting in a uniform and refined microstructure with excellent properties. High Mg content alloy showed complex recrystallization mechanisms, with particle-induced dynamic recrystallization influenced by eutectic structures leading to partially recrystallized microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Bin-Jiang Lv, Sen Wang, Tie-Wei Xu, Feng Guo
Summary: A new wrought magnesium alloy based on Mg-6.0Zn-0.5Mn has been developed, exhibiting a superior combination of high tensile yield strength and good ductility. Addition of minor neodymium and erbium accelerates twinning, dynamic recrystallization, and dynamic precipitation processes, leading to improved mechanical properties. The alloy demonstrates enhanced yield strength, tensile strength, and elongation due to fine complete DRX grains, second phase particles, and a high density of precipitates resulting from the micro-alloying.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
T. Nakata, C. Xu, R. Abe, L. Geng, S. Kamado
Summary: The reheating at high temperature was used to control the textural features in a rolled Mg-Zn-Ca-Mn alloy sheet. Reheating at 450 degrees C caused grain coarsening, leading to the formation of double twinning and shear bands during rolling. Unexpectedly, the basal texture became strong due to the non-uniformly distributed dislocations. On the other hand, reheating at 350 degrees C resulted in uniform deformation-microstructure and apparent texture weakening during post-annealing.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Ming Li, Yuanchun Huang, Yu Liu, Xu Wang, Zhou Wang
Summary: The effects of heat treatment on the dynamic recrystallization behavior, texture, and mechanical properties of a magnesium alloy were investigated. It was found that heat treatment can eliminate microstructures and increase the solid solubility, leading to the occurrence of continuous dynamic recrystallization and dynamic precipitation, which improve the alloy's performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, Z. H. Li, T. T. Sasaki, K. Hono, S. Kamado
Summary: This study reports the influence of grain boundary segregation on microstructure development during hot-rolling of AZ31 alloy. Annealing at 420 degrees C induces strong grain boundary segregation, promoting dynamic recrystallization and strong basal texture. Annealing at 500 degrees C reduces grain boundary segregation, hindering dynamic recrystallization and resulting in a weak rolling-direction-split texture, improving the stretch formability of the alloy sheet.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Yu-Ying He, Gang Fang
Summary: In this study, the dynamic precipitation (DP) of Mg17Al12 phase during the deformation of an Mg-Al-Zn-RE alloy was investigated. The effects of temperature and strain rate on the volume fraction, number density, and average size of Mg17Al12 precipitates were studied. Phenomenological models linking the precipitation parameters with deformation conditions were established and validated. The pinning effect of DP on grain growth and the influence of temperature on DRXed grain size were also discussed. The results provide insights into the understanding of microstructural evolution in the Mg-Al-Zn-RE alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jun Zhao, Bin Jiang, Jun Xu, Weijun He, Guangsheng Huang, Fusheng Pan
Summary: This study discussed the microstructure, texture and mechanical properties of extruded Mg-xGd sheets (with x = 1.0, 1.5, 2.0 and 2.5 wt%). The fully recrystallized microstructure was observed in the extruded Mg-xGd sheets. The texture with [112 over line 1]-[202 over line 1] double fiber orientations was present in all the extruded sheets, and the texture weakening was observed with increasing Gd content. The tensile strength of the sheets gradually increased with an increase in Gd content, mainly due to the fine grain size and more Gd atoms, and the increase in ductility was related to the fine grain size, more Gd atoms and higher Schmid factor for basal slip. Compression twins and double twins played a key role in the formation of [112 over line 1]-[2021] double fiber texture during extrusion. Fine recrystallized grains with an unusual texture of [112 over line 1]-[202 over line 1] double fiber orientation preferentially formed in the undynamically recrystallized matrix with [101 over line 0] fiber orientation through continuous dynamically recrystallization and grew along well-defined bands. Further extrusion deformation resulted in a fully recrystallized microstructure with an unusual texture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Maria Nienaber, Jan Bohlen, Sangbong Yi, Gerrit Kurz, Karl Ulrich Kainer, Dietmar Letzig
Summary: This study investigates the influence of Ca addition in a Y-Zn-containing magnesium alloy on the recrystallization behaviors and formation mechanism of the quadrupole texture. The results show that Ca addition promotes the dynamic recrystallization of WZ10 alloy, but is not beneficial for the formability of WZX100 alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Dong Hee Lee, Byoung Gi Moon, Young Min Kim, Sung Hyuk Park
Summary: This study investigates the effects of extrusion temperature on the microstructural characteristics and mechanical properties of an extruded Mg-9Al-0.8Zn-0.9Ca-0.6Y-0.5MM (AZXWMM91100) alloy, identifying an unusual relationship between the extrusion temperature and tensile strength, attributed to grain coarsening suppression by undissolved particles and strengthening of texture hardening effects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Chunquan Liu, Xianhua Chen, Jiao Chen, Andrej Atrens, Fusheng Pan
Summary: The systematic investigation on microstructural evolution, texture, and mechanical properties of Mg-4Zn-xCa-yMn alloys revealed that alloying with Ca and Mn can enhance strength while reducing ductility. The addition of Mn can mitigate the traditional texture weakening effect of Ca.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Yali Duan, Jianmin Yu, Beibei Dong, Huifang Zhang, Mu Meng, Mei Cheng, Zhimin Zhang, Baohong Zhang, Hongyuan Hao, Ping Xu, Huiling Liu
Summary: Rotating backward extrusion (RBE) is a severe plastic deformation (SPD) method used to produce cylindrical components with very large strain by a single pass. The cup-shaped sample formed by RBE exhibited a typical gradient microstructure, with the average grain size decreasing along the radial direction due to different strains and strain rates in different regions. The center region showed the highest deformation and the edge region exhibited the lowest deformation in the RBEed sample.
Article
Materials Science, Multidisciplinary
Mozhgan Shokri, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Jae Hyung Cho
Summary: The study investigated the correlation between microstructure/texture evolutions and high temperature flow behavior in Mg alloy containing long period stacking order (LPSO) phases. The annealing treatment effectively strengthened the alloy and decreased ductility, with blocky LPSO assisting dynamic recrystallization and lamellar LPSO increasing alloy strength. The findings suggest that microstructure and texture evolution play a significant role in the high-temperature behavior of the Mg alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
