• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >High ultimate tensile stress in nano-grained superelastic NiTi thin films
【24h】

High ultimate tensile stress in nano-grained superelastic NiTi thin films

机译：纳米晶粒超弹性NiTi薄膜中的高极限拉伸应力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

NiTi-films were fabricated by dc magnetron sputtering from melt-cast disc targets. The freestanding films revealed superelastic properties in tensile tests. At 37℃ superelastic properties were achieved showing a closed-loop hysteresis and a plateau of more than 5% strain. The ultimate tensile strength exceeded 1180 MPa for the sputtered films at a maximum strain of 11.5%. This remarkable improvement in mechanical properties over those reported in previous studies correlates with a textured, fine grained (50-200 nm), single phase microstructure, confirmed by transmission electron microstructure. Moreover, these grains revealed a texture which was not found in earlier studies concerning sputtered films. Finally, the prepared specimens did not reveal any evidence of disc or lens shaped Ti_3Ni_4 precipitates but a relatively homogeneous chemistry.
机译：NiTi膜是通过直流磁控溅射从熔融流延的圆盘靶制成的。这些独立的膜在拉伸试验中显示出超弹性。在37℃时获得了超弹性，表现出闭环滞后和超过5％的平稳期。溅射膜的最大抗拉强度超过1180 MPa，最大应变为11.5％。与以前的研究相比，机械性能的显着改善与透射电子显微结构证实的织构化，细晶粒（50-200 nm）单相显微结构有关。此外，这些晶粒显示出在早期有关溅射薄膜的研究中未发现的质感。最后，制备的标本没有显示出任何盘状或透镜状Ti_3Ni_4沉淀的迹象，而是化学性质相对均匀的证据。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号