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Vol.40, No.10, 1027 ~ 1034, 2002
Title
Research papers / Mechanical Behaviors : Evaluation of Creep Crack Growth Behavior in Type 316LN Stainless Steel
이경용Kyung Yong Lee,김우곤Woo Gon Kim,유우석Woo Seog Ryu,윤기봉Kee Bong Yoon
Abstract
Creep crack growth (CCG) behavior of type 316LN stainless steel was investigated using C^* and C_t as characterizing fracture parameters under elevated temperatures The CCG tests were conducted under various applied load levels at 600℃. For determining material constants required for calculating the fracture parameters, tension and creep tests were also conducted at 600℃. Results slowed good agreements between the estimated values and measured ones for both of the C^* and C_t. Since the C_t was applicable to transient creep condition as well as extensive creep condition, the C_t was employed in determining a CCG model for 316 LN. Fracture mode near the crack tip was a typical intergranular fracture as shown in the creep tests. The model determined in this study can be used to evaluate creep crack growth life of components made of 316LN steel.
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