Dynamic fracture toughness of S30408 austenitic stainless steel base and weld metals at -196 ℃

Pan Jian-hua; Chen Xue-dong; Han Yu

doi:10.11883/1001-1455(2013)04-0381-06

Volume 33 Issue 4

Mar. 2014

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Pan Jian-hua, Chen Xue-dong, Han Yu. Dynamic fracture toughness of S30408 austenitic stainless steel base and weld metals at -196 ℃[J]. Explosion And Shock Waves, 2013, 33(4): 381-386. doi: 10.11883/1001-1455(2013)04-0381-06

Citation:

Pan Jian-hua, Chen Xue-dong, Han Yu. Dynamic fracture toughness of S30408 austenitic stainless steel base and weld metals at -196 ℃[J]. Explosion And Shock Waves, 2013, 33(4): 381-386. doi: 10.11883/1001-1455(2013)04-0381-06

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Dynamic fracture toughness of S30408 austenitic stainless steel base and weld metals at -196 ℃

doi: 10.11883/1001-1455(2013)04-0381-06

Pan Jian-hua^{1,2
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Chen Xue-dong^1,2,
Han Yu³

1.
(1. CAS Key Laboratory for Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei230027, Anhui, China;2. National Safety Engineering Technology Research Center on Pressure Vessel and Pipeline, Hefei General Machinery Research Institute, Hefei230031, Anhui, China;3. School of Mechanical Engineering, Ningbo University of Technology, Ningbo315016, Zhejiang, China)

Publish Date: 2013-07-25

Abstract

Abstract

 Charpy pendulum impact tests were carried out on S30408 austenitic stainless steel base and weld metals at -196 ℃. The modified compliance changing rate method was used to obtain the crack initiation point of the base metal specimen. The analyses show that the results obtained by the improved method are more accurate than those by the traditional compliance changing rate method. Based on the experimental loaddisplacement curves, the Schindler procedure and key curve method were combined to achieve the dynamic crack growth resistance curve of the base metal. According to the loaddisplacement curves of the weld metal and its fracture characteristics, the dynamic fracture toughness of the weld metal was calculated by the linear elastic fracture mechanics approach.