کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973848 | 1514631 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rate and temperature dependent deformation behavior of as-cast WE43 magnesium-rare earth alloy manufactured by direct-chill casting
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Rate and temperature dependent deformation behavior of as-cast WE43 magnesium-rare earth alloy manufactured by direct-chill casting Rate and temperature dependent deformation behavior of as-cast WE43 magnesium-rare earth alloy manufactured by direct-chill casting](/preview/png/7973848.png)
چکیده انگلیسی
In this work, we study the deformation behavior of a direct chill cast WE43 Mg alloy. This material initially has equiaxed grains approximately 40 µm in diameter and a random texture. The room temperature, quasi-static response exhibits little plastic anisotropy when evaluated parallel to and normal to the solidification direction and no initial yield tension-compression asymmetry. The deformation at room temperature is accompanied by significant basal texture development and formation of three types of deformation twins: {101Ì
2}ã1Ì
011ã, {101Ì
1}ã1012Ì
ã, and {112Ì
1}ã1Ì
1Ì
26ã as well as double twins {101Ì
1}ã1012Ì
ã-{101Ì
2}ã1Ì
011ã, although each in small amounts < 10% up to failure. We find that in the elevated 250 °C ± 20 °C regime, the material exhibits a negative strain rate sensitivity, with a decreasing flow stress as the strain rate increases. In most of the high-temperature, 250 °C to 350 °C, and high-strain-rate, 0.01/s to 10/s, tests, the material failed at moderate compression strains, 0.35-0.45. Subsequent fracture analyses find that the material fractures transgranularly by a typical shear fracture, often with the presence of additional arrested cracks. At elevated temperatures and under strain rates sufficiently low (i.e., 275 °C and 0.01/s, 300 °C and 0.1/s, 350 °C and 1/s, 375 °C and 10/s) or at a temperature of 400 °C deformation conditions, the material exhibited pseudo-super plastic behavior, experiencing relatively high deformation strains (> 1.0 true strain) without fracturing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 712, 17 January 2018, Pages 50-64
Journal: Materials Science and Engineering: A - Volume 712, 17 January 2018, Pages 50-64
نویسندگان
Mohammad Jahedi, Brandon A. McWilliams, Franklin R. Kellogg, Irene J. Beyerlein, Marko Knezevic,