Super-Elasticity Characteristics of TiNi Alloy Processed by Equal Channel Angular Extrusion

来源 :稀有金属材料与工程 | 被引量 : 0次 | 上传用户:xiaosongshu2009
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A Ni-rich TiNi alloy was processed by Equal Channel Angular Extrusion (ECAE) at 500℃. After four passes ECAE treatment, microstructure of the alloy was refined but slightly inhomogeneous, to sub-micron scale, approximately 0.5~0.6 μm. Comparing with the solution-treated TiNi specimen, the martensitic transformations start (M_s) and peak temperatures (M_p) of TiNi specimens processed by ECAE were dramatically lowered. After ECAE treatment, the R-phase transformation was stimulated and separated from martensitic transformation, but occurred within a larger temperature range. Super-elasticity characteristics of TiNi alloy were tested by tensile loading and unloading cycles. The results revealed that at a tensile strain of 6% or smaller, TiNi alloy processed by four passes ECAE showed better super-elasticity, with less residual strain retained, than solution-treated sample. After tensile strain exceeded 6%, up to 8%, the maximum recoverable strain of TiNi alloy ECAE treated was decreased. Microstructure evolution and its effect on phase transformations and super-elasticity characteristics were discussed.
其他文献
The influences of out-phase electromagnetic field on the as-cast structure of horizontal direct chill casting aluminum alloy ingot were experimental by and nume
主要介绍植物在脱水胁迫下,逆激基因产物的功能和胁迫信号的转导过程.逆激基因产物的功能可分为两类:一类起"保护"作用,另一类起"调节"作用.在脱水胁迫起始信号和基因表达之
以ω(Al_2O_3)>99.1%的电熔致密刚玉,粒度<0.074 mm、ω(SiC)>97%的碳化硅等为主要原料,SiO_2微粉、沥青和Alphabond为添加物,研究了纳米SiC加入量(质量分数,下同)分别为0, 0.5%
在土地资源管理中地理心理系统的作用是极为重要的,其实不仅仅是在土地资源管理中,在很多其他的社会生活领域中地理信息系统的作用都能够得到体现,并且已经形成了一个专门的产业
在氮气保护下于1073 K用同相烧结法制备了Mna(Cu1-xGex)N化合物.XRD分析表明,这类化合物具有Mn3CuN型反钙钛矿相结构.采用激光干涉法测量了Mn3(Cu1-xGex)N化合物的线膨胀系数
以La2O3、SrCO3和Co3O4为原料,采用高温固相反应法制备了La0.8Sr0.2CoO3(LSC)粉体。采用丝网印刷涂膜法在Y2O3稳定的ZrO2(YSZ)固体电解质表面制备LSC膜层,经1400℃煅烧,制成
选用廉价易得的Al(OH)_3为掺杂铝源,制备掺杂量为x=0.01(计量数)的Li_0.97Al_0.01FePO_4和纯LiFePO_4正极材料,并对其进行XRD、SEM分析和电化学性能测试.经过与LiFePO_4标准
铁路是国家重要的基础设施、国民经济的大动脉,交通运输体系的骨干,其影响程度可想而知。铁路既要完成运输生产经营任务,确保安全生产,同时也要为日常的施工维修作业提供必要的条
本文按照组成体育课的三大基本部分(准备部分、基本部分、结束部分)阐述了“开放式”体育课的基本教学模式。该模式以学生发展为中心,突出学生的积极主动参与,满足学生更多的运动
将C纤维增强不同成分配比的ZrB2-SiC复相陶瓷在1400℃下进行静态抗氧化实验,研究了成分配比及氧化时间对材料氧化过程的影响。通过分析氧化后材料的氧化增重率、氧化试样的背