用Landau-Devonshire自由能理论可描述形状记忆合金伪弹性行为随温度变化的规律:温度上升,滞后环位置提高,滞后面积减小;到达临界温度T_c后,滞后全部消失。可是对CuZnAl单晶系统测定结果显示:滞后环位置随温度升高而升高,但滞后面积在一定温度范围内,却基本不变。对滞后环内变化规律的研究结果指出,滞后大小取决于应力诱发马氏体量的多少,马氏体量越多,则滞后面积越大。
A simple model based on the Landau-Devonshire theory is capable ofsimulating the pseudoelastic hysteresis behaviour, i. e., the hysteresis becomes smal-ler with increasing temperature and disappears at a critical temperature. The exper-imental results obtained from CuZnAl memory alloy singleicrystalline specimensshow that the width of the hysteresis loop does not change significantly with tem-perature, while the size of the interior loops of hysteresis strongly depends on themartensitic phase fraction induced from austenite.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%