Effect of grain size on austenite stability and room temperature low cycle fatigue behaviour of solution annealed AISI 316LN austenitic stainless steel

被引：19
作者：
Basu, K.
Das, M.
Bhattacharjee, D.
Chakraborti, P. C. [1 ]
机构：
[1] Jadavpur Univ, Dept Met & Mat Engn, Kolkata 700032, India
[2] TATA Steel, Jamshedpur 831007, Bihar, India
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2007年 / 23卷 / 11期
关键词：
austenitic stainless steel; grain size; low cycle fatigue; martensite; Coffin-Manson;
D O I：
10.1179/174328407X179575
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present paper investigates completely reversed room temperature low cycle fatigue ( LCF) behaviour of solution annealed austenitic stainless steel AISI 316L with two different grain sizes of 90 and 139 mm developed by solution annealing treatment at 1050 and 1150 degrees C respectively and at six strain amplitudes ranging between +/- 0.375 and +/- 1.00%. Complete cyclic hardening has been observed for both the grain sizes. While fine grained steel shows an improvement in cyclic life compared with that of coarse grained steel for strain amplitudes +/- 0.375 and +/- 0.50%, and perfectly follows the Coffin-Manson (C-M) behaviour within the experimental domain, higher cyclic life with bilinear C-M behaviour is observed in the case of coarse grained steel at +/- 0.625% strain amplitude and above. Optical microscopy of fatigue fracture surfaces reveals the formation of martensite on cyclic straining predominantly at higher strain amplitudes.
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收藏
页码：1278 / 1284
页数：7
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