Evaluation of the recovery of thermal aging embrittlement of CF8M cast stainless steels after reversion heat treatments

Jang, Changheui; Jang, Hun; Lee, Jae Gon

doi:10.1016/j.ijpvp.2015.04.011

Cited by 20 publications

(1 citation statement)

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“…For this reason, many experiments have been conducted to quantify varying fracture toughness as well as mechanical properties according to aging time, temperature, and so on. Particularly, experimental efforts have been dedicated to examine fracture toughness of thermally aged CASS materials with different chemical compositions and casting types . Meanwhile, Hong et al experimentally studied variation of mechanical properties and fracture resistance of CF8M among the CASS materials as well as ER316L and ER347 ASS weld materials.…”

Section: Introductionmentioning

confidence: 99%

Crack growth evaluation by XFEM for nuclear pipes considering thermal aging embrittlement effect

Sim

Chang

2018

Fatigue Fract Eng Mat Struct

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Since thermal aging embrittlement (TE) causes loss of fracture toughness and may lead to failure, it is one of structural integrity issues to be assessed in nuclear industry. In this study, crack growth simulation by using extended finite element method (XFEM) was carried out for CF8M base metal and ER316L weld metal, which are typical vulnerable materials. First, user subroutines were constructed to incorporate variation of mechanical properties of two materials due to the TE. In particular, with regard to ER316L, weld residual stress (WRS) distribution was considered. Second, validity of the subroutines and XFEM was confirmed by comparing with analytical and experimental data. Finally, crack growth analyses for nuclear pipes were performed by applying the verified methodology. Thereby, differences of the crack growth amounts and paths as the presence or absence of the TE and WRS were quantified and discussed.

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Section: Introductionmentioning

confidence: 99%