کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573856 | 1514697 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Serrated flow behavior in tungsten heavy alloy
ترجمه فارسی عنوان
رفتار جریان کوره در آلیاژ سنگین تنگستن
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کلمات کلیدی
سرگذشت، آلیاژ سنگین تنگستن، پیری تنش دینامیک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
Flow behavior of a tungsten heavy alloy of composition, 90.5Â wt% W-7.1Â wt% Ni-1.65Â wt% Fe-0.5Â wt% Co-0.25Â wt% Mo was investigated in a temperature range of 223-973Â K and strain rate range of 10â5-10â2Â sâ1. In the temperature range of 773-873Â K, the stress strain curves were characterized by jerky flow pointing towards Dynamic Strain Ageing (DSA)/Portevin Le-Chatelier's (PLC) effect. Characteristics of DSA were analyzed in detail. Based on the value of activation energy determined from the critical strain method, diffusion of interstitials (carbon, oxygen, nitrogen and hydrogen) were thought to be responsible for the DSA effect. The results were discussed in relation to information existing in this area in tungsten heavy alloys. The study of fracture surface of tensile tested samples (in the range of 823-973Â K) showed that the fractographic features, mostly intergranular, predominantly govern the overall ductility of the alloy and do not change except for surface oxidation at relatively higher temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 646, 14 October 2015, Pages 75-81
Journal: Materials Science and Engineering: A - Volume 646, 14 October 2015, Pages 75-81
نویسندگان
Jiten Das, M. Sankaranarayana, T.K. Nandy,