| NiMnGa单晶应力作用下界面运动的金相观察和能量损耗 |
| |
| 引用本文： | 吴振兴,张健,李济林,刘海定,崔玉亭.NiMnGa单晶应力作用下界面运动的金相观察和能量损耗[J].河南科学,2010,28(8):920-924. |
| |
| 作者姓名： | 吴振兴 张健 李济林 刘海定 崔玉亭 |
| |
| 作者单位： | 1. 重庆师范大学,物理与信息技术学院,重庆,400047
2. 重庆仪表材料研究所,重庆,400700 |
| |
| 基金项目： | 重庆市教委科学技术研究项目，重庆市自然科学基金计划项目，重庆市科技攻关计划项目 |
| |
| 摘 要： | 金相观察了Ni53.2Mn22.6Ga24.2单晶样品应力诱发马氏体相变和中间马氏体相变过程中微观结构的变化.实验发现,在单轴应力作用下,马氏体相变和中间马氏体相变的变体重取向的机制不同,马氏体相变生成的变体的重取向是通过孪晶界移动的方式实现的,而中间马氏体相变生成的变体是处于择优取向的变体以逐渐长大的方式完成的.依据应力-应变曲线计算了应力加载和卸载过程的储能、输出功和能耗,结果表明储能、输出功和能耗随形变温度的升高而增大,但在更高的形变温度能耗反而减小.
|
| 关 键 词： | 马氏体相变 中间马氏体相变 孪晶界移动 能量损耗 |
Metallographic Observation and Energy Consumption of Boundary Motion under the Stress on NiMnGa Single Crystal |
| |
| Wu Zhenxing,Zhang Jian,Li Jilin,Liu Haiding,Cui Yuting.Metallographic Observation and Energy Consumption of Boundary Motion under the Stress on NiMnGa Single Crystal[J].Henan Science,2010,28(8):920-924. |
| |
| Authors: | Wu Zhenxing Zhang Jian Li Jilin Liu Haiding Cui Yuting |
| |
| Institution: | 1.College of Physics and Information Technology,Chongqing Normal University,Chongqing 400047,China;2.Chongqing Instrument Material Research Institute,Chongqing 400700,China) |
| |
| Abstract: | The microstructural evolvement of martensitic and intermartensitic transformation induced by the single axis in the Ni53.2Mn22.6Ga24.2 single crystal have been observed by the method of the metallography.It has been found that the mechanism of rearrangement of martensitic variants is different with that of intermartensitic variants.The rearrangement of martensitic variants is completed through the twin boundary motion.Contrary,the rearrangement of intermartensitic variants is accomplished by means of the growth of the preferential oriented twin-variants.Accordingto the stress-strain curves,the energy storage,output work and energy consumption have been calculated.The results show that the energies increase with increasing the deformation temperature.However,when the deformation temperature is increased to the higher value,the energy consumption decrease. |
| |
| Keywords: | martensitic transformation intermartensitic transformation twin-boundary motion energy consumption |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
