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热轧Ni_(47)Ti_(44)Nb_9形状记忆合金板材的织构及其对拉伸和恢复性能的影响
Alternative TitleTexture and its influence on tensile and recoverable properties of hot-rolled Ni_(47)Ti_(44)Nb_9 shape memory alloy sheet
颜莹; 金伟; 周亭俊
2010
Source Publication中国有色金属学报
ISSN1004-0609
Volume20.0Issue:011Pages:2148-2153
Abstract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}〈uv0〉和{111}〈uvw〉丝,沿轧向(RD),{001}〈uv0〉丝织构中强组分向{001}〈010〉靠近,{111}〈uvw〉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%。
Other AbstractThe 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 ℃.
KeywordNi47Ti44Nb9形状记忆合金 织构 拉伸性能 恢复应变 断裂
Indexed ByCSCD
Language中文
CSCD IDCSCD:4065511
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/154984
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
颜莹,金伟,周亭俊. 热轧Ni_(47)Ti_(44)Nb_9形状记忆合金板材的织构及其对拉伸和恢复性能的影响[J]. 中国有色金属学报,2010,20.0(011):2148-2153.
APA 颜莹,金伟,&周亭俊.(2010).热轧Ni_(47)Ti_(44)Nb_9形状记忆合金板材的织构及其对拉伸和恢复性能的影响.中国有色金属学报,20.0(011),2148-2153.
MLA 颜莹,et al."热轧Ni_(47)Ti_(44)Nb_9形状记忆合金板材的织构及其对拉伸和恢复性能的影响".中国有色金属学报 20.0.011(2010):2148-2153.
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