In-situ TEM observations on interaction of basal <a> dislocations and β′ phases in a Mg-Gd binary alloy

被引：23

作者：

Xu, Mengning ^{[1
]}

Li, Na ^{[1
]}

Sha, Xuechao ^{[2
]}

Liu, Yi ^{[1
]}

Gao, Bo ^{[1
]}

Xiao, Lirong ^{[1
]}

Chen, Xuefei ^{[3
]}

Zhou, Hao ^{[1
,4
]}

机构：

[1] Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China

[2] Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China

[3] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[4] Harbin Univ Sci & Technol, Key Lab Adv Mfg & Intelligent Technol, Minist Educ, Harbin 150080, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 841卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Magnesium alloys; Precipitation; In-situ TEM; Orowan mechanism; Strengthening mechanism; MECHANICAL-PROPERTIES; HIGH-STRENGTH; MICROSTRUCTURE EVOLUTION; SEGREGATION; PRECIPITATION;

D O I：

10.1016/j.msea.2022.143017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Here we report in-situ TEM observations on interaction between dislocations and beta' phases in aged Mg-Gd alloys. The slipping < a > dislocations squash into the interface and bow out to bypass the beta' phase, leading to a zigzag route of plastic flow. Orowan mechanism is determined as the main strengthen mechanism.

引用

页数：6

共 7 条

[1] In-situ TEM study of <c plus a> dislocations in Mg-Y alloys
Wu, Jing
Lu, Sirong
Tian, Jinsen
Chiu, Yulung
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2024, 897
[2] Role of <a> and <c plus a> dislocations on the room-temperature grain boundary migration in a deformed Mg alloy
Zhang, Zijian
Yuan, Lin
Ma, Jiaping
Zheng, Mingyi
Shan, Debin
Guo, Bin
INTERNATIONAL JOURNAL OF PLASTICITY, 2024, 172
[3] Formation Formation of and interaction between β′F and β′ phases in a Mg-Gd alloy
Liu, H.
Xu, W. F.
Wilson, N. C.
Peng, L. M.
Nie, J. F.
JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 712 : 334 - 344
[4] The effect of basal <a> dislocation on {11(2)over-bar1} twin boundary evolution in a Mg-Gd-Y-Zr alloy
Zhang, Huan
Li, Yangxin
Liu, Yuxuan
Zhu, Qingchun
Qi, Xixi
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Jin, Peipeng
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2021, 81 : 212 - 218
[5] In-situ TEM characterization of basal dislocations between nano-spaced long-period stacking ordered phases in MgYZn alloy
Li, Quan
Song, Jian
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Zhang, Qi
Zhu, Qingchun
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SCRIPTA MATERIALIA, 2023, 235
[6] In-situ TEM observation of <c>-axis extension twin nucleation in single crystalline Mg
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Nakagawa, Eri
Hara, Yuka
Moronaga, Taku
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Ohmura, Takahito
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2024, 890
[7] In-situ observation of the interaction of {10(1)over-bar2}a deformation twinning with 18R long period stacking ordered precipitates in an Mg-5Gd-3.5Ga (at.%) as-cast alloy
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Zhuang, Yuanlin
Zhao, Ligong
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Zheng, He
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SCRIPTA MATERIALIA, 2022, 210

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In-situ TEM observations on interaction of basal &lt;a&gt; dislocations and β′ phases in a Mg-Gd binary alloy

In-situ TEM observations on interaction of basal <a> dislocations and β′ phases in a Mg-Gd binary alloy