Surface Superelastic Microalloying for Improved Fatigue Performance in Ni Ti Fe and Cu Based Alloys

表面超弹性微合金化可改善 Ni Ti Fe 和 Cu 基合金的疲劳性能

• 批准号: 8821755
• 负责人: David Grummon
• 金额: $ 22.47万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-15 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821755&HistoricalAwards=false
• 关键词: Surface; Superelastic; Microalloying; Improved; Fatigue

A combination of sputter coating and ion bean implantation will be used to produce beta phase intermetallic compounds on the surface of base metals. The superelastic properties of the beta phase are expected to severely limit the nucleation and propagation of low cycle fatigue cracks. In the first phase of the study, NiTi superelastic microalloys will be prepared by sputtering thin films onto Cu and Ni substrates. Their composition, transformation temperature and crystallography will be determined. In the second phase of the study adherent films of superelastic material will be produced on base metal specimens by ion beam mixing. The effects on low cycle fatigue properties will be studied.

采用溅射涂层和离子豆注入相结合的方法在贱金属表面制备β相金属间化合物。预期β相的超弹性特性将严重限制低周疲劳裂纹的形核和扩展。在研究的第一阶段，将通过溅射薄膜在Cu和Ni衬底上制备NiTi超弹性微合金。它们的组成、转变温度和结晶学将被确定。在研究的第二阶段，将通过离子束混合在贱金属试样上产生超弹性材料的粘附膜。将研究其对低周疲劳性能的影响。