کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11020064 | 1717613 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Shear band and αâ²-martensite induced by stress in laser melting carbide-free bainite layer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
By means of laser melting and following isothermal transformation (LMFIT), the shear band and αâ²-martensite in mid-carbon alloy steel layer induced by stress were analyzed. The residual stress, microstructures and nanohardness were analyzed by X-ray stress analyser, X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindentation. The results indicate that the carbide-free baninte layers with high hardness are formed on the surface of mid-carbon and high-carbon alloy steels. By LMFIT, the hardness of mid-carbon alloy steel layer can be increased by the carbon supersaturation in bainite ferrite (BF). Meanwhile, shear band and αâ²-martensite can be induced by thermal stress in mid-carbon alloy steel layer to further improve the hardness. The gradient change of residual stress in the bainite layer leads to that of the nanohardness in bainite layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 738, 19 December 2018, Pages 367-374
Journal: Materials Science and Engineering: A - Volume 738, 19 December 2018, Pages 367-374
نویسندگان
Xiaolei Xing, Yefei Zhou, Hui Yu, Ligang Liu, Lijie Zhang, Qingxiang Yang,