Creep properties of V-4Cr-4Ti strengthened by cold working and aging

被引：21

作者：

Zheng, P. F. ^{[1
]}

Nagasaka, T. ^{[2
]}

Muroga, T. ^{[2
]}

Chen, J. M. ^{[3
]}

Li, Y. F. ^{[2
]}

机构：

[1] Grad Univ Adv Studies Sokendai, Dept Fus Sci, Toki, Gifu 5095292, Japan

[2] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[3] SW Inst Phys, Chengdu 610041, Peoples R China

来源：

FUSION ENGINEERING AND DESIGN | 2011年 / 86卷 / 9-11期

关键词：

V-4Cr-4Ti; Creep; Strengthening; Cold working; Aging; MECHANICAL-PROPERTIES; PRECIPITATION; ALLOYS; FUSION; BEHAVIOR;

D O I：

10.1016/j.fusengdes.2011.01.081

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A study on uniaxial creep properties of V-4Cr-4Ti alloy (NIFS-HEAT-2) is carried out at 700 degrees C and 750 degrees C in a vacuum better than 1 x 10(-6) Torr. The alloy is thermomechanically treated by cold working and aging for strengthening. The treatment introduces high density dislocations and fine precipitates. The pinning by precipitates is considered to suppress the glide of dislocations, causing significantly low creep rate at high stress levels. Power-law dependence of the minimum creep rate on applied stress was found. The predominant mechanism of creep deformation for the alloy with the strengthening is most likely to be dislocation climbing, because the creep activation energy is near the diffusion activation energy of vanadium. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2561 / 2564

页数：4

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