کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1575321 | 1514740 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Activation energy for serrated flow in type 316L(N) austenitic stainless steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Tensile tests were performed at a wide range of strain rates (3.16Ã10â5â3.16Ã10â3Â sâ1) and temperatures (300-1123Â K) to examine serrated flow behaviour, an important manifestation of dynamic strain ageing (DSA), in type 316L(N) austenitic stainless steel. The steel exhibited distinct low and high temperature serrated flow regimes separated by a retardation bay. Based on the activation energy value of 115Â kJÂ molâ1, diffusion of interstitial carbon has been suggested to be responsible for serrated flow in the low temperature regime. In the high temperature regime, an average activation energy value of 206Â kJÂ molâ1 obtained using different methods indicated that diffusion of substitutional chromium atom is responsible for DSA. Disappearance of serrations at high temperatures has been ascribed to the effects associated with precipitation reaction between chromium and carbon atoms. The influence of nitrogen retarding DSA in type 316L(N) stainless steel has been discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 603, 6 May 2014, Pages 160-168
Journal: Materials Science and Engineering: A - Volume 603, 6 May 2014, Pages 160-168
نویسندگان
B.K. Choudhary,