Investigation of the cause of serration generation in Al-Mg alloy using In-situ XRD/DIC simultaneous measurement

被引：0
|
作者：
Adachi H. [1 ]
Kitano T. [2 ]
Hirata M. [2 ]
Okai D. [1 ]
机构：
[1] University of Hyogo, Graduate school of engineering, Department of materials and Synchrotron radiation engineering（, 2167, Shosha, Himeji-shi, Hyogo
[2] University of Hyogo, Graduate school of engineering, Department of materials and Synchrotron radiation engineering, Himeji-shi, Hyogo
来源：
Keikinzoku/Journal of Japan Institute of Light Metals | 2023年 / 73卷 / 12期
关键词：
Al-Mg alloy; dislocation density; In-situ XRD/DIC measurement; PLC band; serration;
D O I：
10.2464/jilm.73.628
中图分类号：
学科分类号：
摘要：
Type-B serrations were observed during room-temperature tensile deformation of Al-2.17mass%Mg alloy with an average grain size of 12 μm. Digital image correlation was used to visualize Portevin-Le Chatelier (PLC) bands, and microstructural changes in these bands were observed by in-situ X-ray diffraction measurements using synchrotron radiation at SPring-8. The results indicated that the overall density of dislocations, including both mobile and pinned dislocations inside the PLC bands, increased substantially as the bands formed. This suggests that serration occurs due to an increase in the mobile dislocation density resulting from the formation of new dislocations from sources inside the PLC bands. © 2023 The Japan Institute of Light Metals.
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页码：628 / 632
页数：4
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