An anomaly of the positron parameters for plastically deforming shape memory alloy Cu-Zn-Al

Jingcheng Wang; Zichang Shao; Jialing Jin

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An anomaly of the positron parameters for plastically deforming shape memory alloy Cu-Zn-Al

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- An anomaly of the positron parameters for plastically deforming shape memory alloy Cu-Zn-Al
- Nuclear Techniques Vol. 12, Issue 7, (1989)
- 作者机构：
  
  上海钢铁研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：07 December 1987，
  
  Published：1989-07
- 稿件说明：
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Jingcheng Wang, Zichang Shao, Jialing Jin. An anomaly of the positron parameters for plastically deforming shape memory alloy Cu-Zn-Al[J]. Nuclear techniques, 1989, 12(7): 430-432.
DOI：

Jingcheng Wang, Zichang Shao, Jialing Jin. An anomaly of the positron parameters for plastically deforming shape memory alloy Cu-Zn-Al[J]. Nuclear techniques, 1989, 12(7): 430-432. DOI：

摘要

用正电子湮没方法研究金属合金的塑性变形，一般说，于初始变形阶段，正电子湮没参数随变形量增长而增大，当大到一定程度时，正电子湮没参数呈现饱和趋势。但也有例外，如马氏体Cu-Zn-A1合金冷轧变形量在5%左右时，其正电子湮没参数基本不变。与此现象相关的可能原因是初期的变形机制主要属马氏体片的自协作机制而不是一般的滑移机制。

Abstract

The positron annihilation parameters increase initially with increasing reduction of thickness

then are saturated for the common samples of metals and alloys

so far as we have known. In studying Cu-Zn-A1 shape memory effect

however

we found no increase of S-parameter about 5% thickness reduction when the sample is cold-rolled. The anomaly may be due to the self-accommodating mechanism of martensite plates in initially deforming

not the sliding

thus resulting in no increase of defects to which positron are sensitive.

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references

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J. Baram and M. Rosen ., Phys. status solidi （ a ） , 16 （ 1973 ）, 263 .

Ch. Dauwe et al . , Phys. status solidi （ a ） , 47 （ 1973 ）, 443 .

W. Brandt and R. Paulin , Phys. Lett. , A48 （ 1974 ）, 6 : 480 .

K. Hinode et al . , J. Phys. Soc. Japan , 39 （ 1975 ）, 2 : 545 .

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王振杰等，金属学报， 17 （ 1981 ）, 6 : 673 。

G. Dlubek et al . , Phys. status solidi （ a ） , 52 （ 1979 ）, 217 .

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