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J. Ocean Eng. Technol. 1999;13(3):68-76.    

A Study on the Creep Characteristics according to Groove Shape of T-Welded Joint
Bang, Han-Seo;Kim, Jong-Myeong;
T-Joint 용접부의 Groove형상별 크리프 특성에 관한 연구
방한서;김종명;
Copyright © 1999 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Post Welding Heat Treatment, Numerical Analysis, Welding Residual Creep Strains, Thermal-Elasto-Plasto-Creep, T-Welded Joint
핵심용어: 용접후열처리, 수치해석, 용접잔류 크리프 변형율, 점열탄소성, T-용접부
Abstract
The welding residual stresses produced by the welding frequently caused a crack and promote stress corrosion etc. in HAZ(heat affected zone) contained with external load and weakness of material. Therefore, PWHT(post welding heat treatment) is widely used to reduce wekdubg residuss, to relax hardening of heat affected zone and to get rid of impurity. In this study, in order to define the effect on shappes of T-welded joint, during the post welding heat treatment, we have carried out numerical analyses on the several test pieces by using computer program which was based on thermal-elasto-plato-plasto-creep theories for the study. The main results obtained form this study is as follows: 1) The mechanical difference for change the thickness of plate and groove angle did not appear. 2) The distribution modes of welding residual stresses are same on the all test specimens during the post welding heat treatment. 3) In a mecharical point of view, minimum groove groove angle($40^{circ}$) is more suitable than maximum groove angle($60^{circ}$). 4) Therefore, it is appropriate to minimize the size of groove shape in strength and safety.


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