Effect of rate on the deformation properties of metastable β in a high Sn content zirconium alloy

被引：4

作者：

Cochrane, C. ^{[1
]}

Skippon, T. ^{[1
]}

Daymond, M. R. ^{[1
]}

机构：

[1] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2019年 / 119卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Phase transformation; Stress relaxation; Rate-dependent material; Mechanical testing; X-ray diffraction; STRAIN-RATE SENSITIVITY; ACTIVATION VOLUME; TRANSFORMATION; TEMPERATURE; TITANIUM; PHASE; MECHANISMS; BEHAVIOR; TENSILE; PLASTICITY;

D O I：

10.1016/j.ijplas.2019.02.019

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The quaternary zirconium alloy, Zr-3.5Sn-0.8Mo-0.8Nb, has shown promise as a possible system for utilization of transformation-induced plasticity. In this study, we investigate the effect of strain rate and stress-relaxation on the beta -> alpha phase transformation at room temperature, and present a technique to characterize the thermally-activated deformation of component phases of multi-phase alloys. The apparent activation volume of the a phase of this alloy is 13-18b(3), in agreement with previous studies on a-zirconium alloys, while the beta phase has an apparent activation volume of 80-150b(3). The deformation-induced phase transformation is observed to occur more readily at lower strain rates, due to a higher strain-rate dependence than dislocation slip. This effect may lead to enhanced resistance to necking in this alloy during forming operations.

引用

页码：102 / 122

页数：21

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