摘要
为了研究CuAlMn形状记忆合金的相变滞后效应 ,以Cu -Al10 .6 1-Mn6 .95 (w (B) / % )合金 (A合金 )与Cu -Al11.0 5 -Mn6 .81-Zn0 .2 1(w (B) / % )合金 (B合金 )为研究对象 ,应用电阻法测定其相变点 ,并利用X射线衍射谱标定其结构 .结果表明 ,A合金主要由 18R马氏体构成 ,B合金主要由 9R马氏体构成 ,而 9R马氏体结构的合金相变滞后温度远大于 18R马氏体结构的合金 .为了进一步研究变形对相变滞后温度的影响 ,对B合金进行了拉伸变形试验 .研究发现 。
In order to study the wide transformation hysteresis effect of CuAlMn SMA, two kinds of alloys are described. One is alloy A, with the composition of Cu-Al10.61-Mn6.95 (w(B)/%), and the other is alloy B, with Cu-Al11.05-Mn6.81-Zn0.21 (w(B)/%). Martensitic transformation temperatures were determined by resistance measurements and the structure of alloys was determined by X ray diffraction analysis. It is found that alloy A is mainly composed of 18R martensite, whereas alloy B is mainly composed of 9R martensite. The transformation hysteresis of alloy B is much more greater than alloy A. Tensile experiments were carried out on specimens of alloy B. It was shown that the transformation hysteresis can be enlarged effectively through increasing the prestrain of specimens.
出处
《材料科学与工艺》
EI
CAS
CSCD
2001年第4期406-409,共4页
Materials Science and Technology
