LUO Laizhong ZHANG Jinxiu LIN Guangming Zhongshan University
,
Guangzhou
,
510275
,
China Lecturer
,
Dept.of Physics and Institute of Material Science
,
Zhongshan University
,
Guangzhou
,
510275
,
China
金属学报(英文版)
The snap-action behavior of a Ni-Ti alloy disc which is controlled by combination of a nonlinear stress field and temperature has been studied.After treatment for two-way shape memory,all shape memory strain of snap-action finishes abruptly at a certain temperature within an interval of less than 1 ms.The results of resistance measurement and in-situ X-ray diffraction indicate that the snap-action strain is mainly resulted from the snap-action β (?)R transformation.
关键词:
shape memory alloy
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null
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null
WU Shanghua LIU Yumen Materials Science Institute
,
Zhongshan University
,
Guangzhou
,
510275
,
China.Department of Materials Science and Engineering
,
Xi'an Jiaotong University
,
Xi'an
,
710049
,
China.To whom correspondence should be addressed.
材料科学技术（英）
The martensitic transformation in Fe-Cr-W-V-C alloy has been investigated by TEM.The habit plane of martensite is near (252)_f, the austenite/martensite orientation relationship is Kurdjumov-Sachs'.In the martensite plates there are twins on (112)[ 1]_b,dislocation tangles and the lattice defects on (011)_b plane.In the austenite near the growing martensite plates,the dislocations with high density and stacking faults can be observed. The substructure of martensite may probably be the result of accommodation deformation during martensitic transformations.
关键词:
martensite
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null
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null
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null
张宇
,
黄勇平
,
麦堪成
高分子材料科学与工程
用熔融法制备了马来酸酐(MAH)及其与苯乙烯(St)混合单体改性PP/PS共混物,以及MAH、St改性聚丙烯(原位形成PP/PS共混物).用DSC、DMA和FT-IR研究了改性共混物的结晶与熔融行为、动态力学性能和接枝产物.结果表明,MAH加入对PP/PS共混物中PP的结晶温度影响不大,但其与St混合单体对共混物中PP的结晶温度影响明显,原位生成PP/PS的结晶温度也有较大提高.改性对共混物中PP的熔融温度影响不大,但熔融峰形变化明显.改性PP/PS共混物具有高的E′和E″强度.教育部聚合物基复合材料及功能材料重点实验室, 广东广州 510275)
关键词:
反应性单体
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结晶与熔融行为
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动态力学性能
