期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 528, 期 18, 页码 6051-6058出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.03.096
关键词
Strain-induced phase transformation; In situ neutron diffraction; Cobalt-based superalloy
类别
资金
- National Science Foundation (NSF) [DMR - 0909037, CMMI - 0900271]
- International Materials Institutes (IMI)
- Tennessee Advanced Materials Laboratory
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0900271] Funding Source: National Science Foundation
The strain-induced face-centered cubic (FCC)-> hexagonal-close packed (HCP) phase transformation in a cobalt-based superalloy was investigated with four in situ loading neutron-diffraction experiments: monotonic tension, monotonic compression, high-cycle fatigue, and low-cycle fatigue. The transformation onsets for the four respective cases were 685 MPa, 698 MPa, 1 cycle, and 3 cycles, respectively. The HCP phase accumulated at rates of 0.1 wt.%-MPa-1 and 0.05 wt.%-MPa-1 for the tension and compression cases, respectively. For the cyclic-loading cases, the accumulation rates were found to be inversely proportional to the number of fatigue cycles. The results under the different loading modes suggest that the phase transformation occurs according to a tensile plastic-work criterion. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据