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http://dx.doi.org/10.3795/KSME-A.2017.41.9.809

Fatigue Crack Growth Characteristics of Cold Stretched STS 304 Welded Joint  

Lee, Jeong Won (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Na, Seong Hyeon (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Yoon, Dong Hyun (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Kim, Jae Hoon (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Kim, Young Kyun (Korea Gas Coporation R&D Division)
Kim, Ki Dong (Korea Gas Coporation R&D Division)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.41, no.9, 2017 , pp. 809-815 More about this Journal
Abstract
STS 304 steel is used as pressure vessel material, and although it exhibits excellent mechanical characteristics at a low temperature, it is heavier than other materials. To address this issue, a method using cold-stretching techniques for STS 304 can be applied. In this study, a cold-stretching part and welded joint specimen were directly obtained from a cold-stretching pressure vessel manufactured according to ASME code. Fatigue crack propagation tests were carried out at room temperature and $-170^{\circ}C$ using the compliance method for stress ratios of 0.1 and 0.5. The results indicate that crack growth rate of the welded joint is higher than that of the cold-stretching part within the same stress intensity factor range. The outcome of this work is expected to serve as a basis for the development of a cold-stretched STS 304 pressure vessel.
Keywords
Cold Stretching; Cryogenic Temperature; Fatigue Crack Propagation; Welded Joint;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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