Structure and mechanical properties of an Ni3Al single crystal upon high-temperature deformation

被引：0
|
作者：
N. N. Stepanova
D. I. Davydov
D. P. Rodionov
Yu. I. Philippov
Yu. N. Akshentsev
N. I. Vinogradova
N. V. Kazantseva
机构：
[1] Russian Academy of Sciences,Institute of Metal Physics, Ural Division
来源：
The Physics of Metals and Metallography | 2011年 / 111卷
关键词：
single crystal; superplasticity; Ni; Al; deformation; mechanical properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Structure and strength properties of single-crystal 〈001〉 samples of Ni3Al have been studied in the as-grown and homogenized state during tensile tests in the temperature range of 1150–1250°C. At the strain rate of 1.32 mm/min (2 × 10−5 m/s), the samples are in the state of superplasticity. The basic mechanism of relaxation is dynamic recovery; in some regions of the sample, recrystallized grains are formed. At 1250°C, coarse twins are observed in the zone of fracture, which indicates the “switching on” of additional slip systems necessary to guarantee the relaxation process.
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页码：403 / 409
页数：6
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