Residual stress determination in a dissimilar weld overlay pipe by neutron diffraction

被引：49

作者：

Woo, Wanchuck ^{[1
]}

Em, Vyacheslav ^{[1
]}

Hubbard, Camden R. ^{[2
]}

Lee, Ho-Jin ^{[3
]}

Park, Kwang Soo ^{[4
]}

机构：

[1] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305353, South Korea

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Korea Atom Energy Res Inst, Nucl Mat Res Ctr, Taejon 305353, South Korea

[4] Doosan Heavy Ind & Construct, Corp R&D Inst, Chang Won 641792, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 27期

关键词：

Neutron diffraction; Residual stresses; Dissimilar weld; Pressurized nozzle; Overlay; STAINLESS-STEEL; CRACKING; THIN;

D O I：

10.1016/j.msea.2011.07.059

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Residual stresses were determined through the thickness of a dissimilar weld overlay pipe using neutron diffraction. The specimen has a complex joining structure consisting of a ferritic steel (SA508), austenitic steel (F316L), Ni-based consumable (Alloy 182), and overlay of Ni-base superalloy (Alloy 52M). It simulates pressurized nozzle components, which have been a critical issue under the severe crack condition of nuclear power reactors. Two neutron diffractometers with different spatial resolutions have been utilized on the identical specimen for comparison. The macroscopic 'stress-free' lattice spacing (d(o)) was also obtained from both using a 2-mm width comb-like coupon. The results show significant changes in residual stresses from tension (300-400 MPa) to compression (-600 MPa) through the thickness of the dissimilar weld overlay pipe specimen. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：8021 / 8027

页数：7

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