热轧Ni47Ti44Nb9形状记忆合金板材的织构及其对拉伸和恢复性能的影响
Texture and its influence on tensile and recoverable properties of hot-rolled Ni47Ti44Nb9 shape memory alloy sheet
查看参考文献15篇
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文摘
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采用XRD,SEM和拉伸试验机对热轧Ni47Ti44Nb9形状记忆合金板材的织构及其对拉伸和恢复性能的影响进行研究,以便为改善该合金的力学和记忆性能提供理论依据.热轧板材的织构主要为{001}和{111}丝,沿轧向(RD),{001}丝织构中强组分向{001}<010>靠近,{111}丝织构中的{111}<112>和{111}<165>组分较强;沿横向(TD),强织构组分为{001}<010>和{111}<132>;热轧板材经高于再结晶温度热处理后,沿轧向,应力诱发马氏体相变临界应力最高,与轧向成45°角方向的临界应力最低,且沿横向拉伸断口表面出现很多微裂纹;经850℃热处理后,临界应力随着冷速的加快而降低,且该温度下退火板材的织构对可恢复应变的影响不明显,基本在7.0%~7.4% |
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其他语种文摘
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The texture and its influence on tensile and recoverable properties of hot-rolled Ni47Ti44Nb9 shape memory alloy sheet were studied by XRD,SEM and tensile tester to provide theoretic basis for improving mechanical and memory properties of the alloy. The main textures of hot-rolled sheets are {001} <uv0> and {111} uvw fibres. The strong components in {001} <uv0> fibre approach to {001} 010 component, and {111} <112> and {111} 165 components are stronger in {111} uvw fibre along RD.The {001} <010> and {111} <132> are the strong components along TD;The critical stress of stress-induced martensite transformation along RD is the maximum and the minimum is along 45° to RD for hot-rolled sheet heat-treated at temperature higher than the recrystallization temperature, and some micro-cracks appear on the fracture surface of the specimen tensioned along TD.The critical stress decreases with increasing the cooling rate at 850 ℃, and texture has no obvious influence on the recoverable strain whose values are basically in the range of 7.0%-7.4% for sheet annealed at 850 ℃ |
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来源
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中国有色金属学报
,2010,20(11):2148-2153 【核心库】
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关键词
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Ni47Ti44Nb9形状记忆合金
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织构
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拉伸性能
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恢复应变
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断裂
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地址
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1.
东北大学材料物理与化学研究所, 沈阳, 110004
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中国科学院金属研究所, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0609 |
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学科
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金属学与金属工艺 |
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基金
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中国核动力研究设计院核燃料及材料国家重点实验室基金
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文献收藏号
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CSCD:4065511
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