کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1583082 | 1514881 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strength of AISI 316L in torsion at high temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Hot torsion flow behaviour of 30 μm grained AISI 316L stainless steel was investigated in the range of temperatures 850-1100 °C with equivalent strain rates 0.0001-0.006 sâ1. For temperatures higher than 900 °C the material presented an unusual linear relationship at low strains between equivalent stress, ÏEq, and equivalent strain, ÉEq, whilst at 850 °C a parabolic ÏEq-ÉEq relationship was observed. The flow behaviour of 100 μm grained AISI 316L stainless steel torsionally deformed at 1000 °C with equivalent strain rate of 0.006 sâ1 was reported to follow the expected parabolic ÏEq-ÉEq relationship and produced a significantly higher flow stress than the 30 μm grained material (about 40% higher at 0.5 equivalent strain). In both materials an unusual grain shape evolution from pre-deformation equiaxed to rhomboidal was observed during torsion, which was rationalised [G. Angella, B.P. Wynne, W.M. Rainforth, J.H. Beynon, Acta Mater. 53 (2005) 1263] in terms of strain induced grain boundary migration (SIGBM) combined with the torsion stress field. A qualitative model is proposed to describe the flow behaviour of the AISI 316L stainless steel based on the unusual grain structure evolution and, in turn, on SIGBM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 475, Issues 1â2, 25 February 2008, Pages 257-267
Journal: Materials Science and Engineering: A - Volume 475, Issues 1â2, 25 February 2008, Pages 257-267
نویسندگان
G. Angella, B.P. Wynne, W.M. Rainforth, J.H. Beynon,