Optimization of microstructure and mechanical properties of electron beam welded CuCrZr alloys

被引：1

作者：

Lü C.-Y. ^{[1
,2
]}

Li H.-Z. ^{[1
]}

Li Y.-F. ^{[1
]}

Zhong F.-P. ^{[3
,4
]}

Li H.-X. ^{[1
]}

Zheng W.-J. ^{[1
]}

Ma Y.-H. ^{[1
]}

Gao Z.-L. ^{[1
]}

Yang J.-G. ^{[1
]}

He Y.-M. ^{[1
]}

机构：

[1] Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou

[2] Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai

[3] Zhejiang Special Equipment Research Institute, Hangzhou

[4] Zhejiang Special Equipment Safety Testing Technology Research Key Laboratory, Hangzhou

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 07期

基金：

中国国家自然科学基金;

关键词：

CuCrZr alloy; electron beam welding; fusion reactor waveguide; mechanical property; microstructure; post-weld heat treatment;

D O I：

10.11817/j.ysxb.1004.0609.2022-43514

中图分类号：

学科分类号：

摘要：

In present paper, the effects of electron beam welding (EBW) parameters and post-weld heat-treatment conditions on the microstructure and mechanical properties of CuCrZr alloy as the candidate for next-generation waveguide in thermonuclear fusion reactor were investigated using microstructural characterization and mechanical tests. On this basis, the underlying formation mechanism of joint and influence of EBW parameter on the microstructure and properties of joint were revealed. The results show that the joints of CuCrZr allows are composed of heat-affected zone (HAZ), fusion zone (FZ) and weld zone (WZ). The HAZ can be further divided into fine grain HAZ (FGHAZ) and coarse grain HAZ (CGHAZ). The best ultimate tensile strength (UTS) of joint obtained in current study reaches 333 MPa, meeting the ITER requirement of waveguide weldment (＞280 MPa). The post-weld heat treatments are utilized to modified the microstructure and residual stress distribution of joint. The UTS of joint with heat-treatment at 500 ℃ for 12 h is increased to 408 MPa, about 22.3% higher than the joint without heat treatment. The Cr precipitation in WZ is facilitated by the heat treatment, contributing to the precipitation hardening. © 2023 Central South University of Technology. All rights reserved.

引用

页码：2170 / 2184

页数：14

共 26 条

[1]

SCHRECK S, AIELLO G, MEIER A, Et al., ITER ECRH upper launcher: Test plan for qualification of the diamond torus window prototype Ⅲ [J], Fusion Engineering and Design, 109, pp. 1232-1236, (2016)

[2]

AIELLO G, CASAL N, GAGLIARDI M, Et al., Design evolution of the diamond window unit for the ITER EC H&CD upper launcher[J], Fusion Engineering and Design, 146, (2019)

[3]

AIELLO G, SCHERER T, AVRAMIDIS K, Et al., Diamond window technology for electron cyclotron heating and current drive: State of the art[J], Fusion Science and Technology, 75, pp. 719-729, (2019)

[4]

FU Yun, Corrosion behavior of CuCrZr alloy for fusion reactor in high-temperature and high-pressure water, (2018)

[5]

HUANG F, MA J, NING H, Et al., Analysis of phases in a Cu-Cr-Zr alloy[J], Scripta Materialia, 48, 1, (2003)

[6]

BI L M, LIU P, CHEN X H, Et al., Analysis of phase in Cu-15%Cr-0.24%Zr alloy[J], Transactions of Nonferrous Metals Society of China, 23, 5, (2013)

[7]

ZENG K J, HAMALAINEN M., A theoretical study of the phase equilibria in the Cu-Cr-Zr system[J], Journal of Alloys and Compounds, 220, 1, (1995)

[8]

EDWARDS D J, SINGH B N, TAHTINEN S., Effect of heat treatments on precipitate microstructure and mechanical properties of a CuCrZr alloy[J], Journal of Nuclear Materials, 367, pp. 904-909, (2007)

[9]

KALININ G M, IVANOV A D, OBUSHEV A N, Et al., Ageing effect on the properties of CuCrZr alloy used for the ITER HHF components[J], Journal of Nuclear Materials, 367, pp. 920-924, (2007)

[10]

PENG Li-jun, Study on microstructure evolution of Cu-Cr-Zr system alloys and interaction mechanism between alloying elements, (2014)

← 1 2 3 →