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DOI | 10.1038/s41467-019-10453-0 |
Absence of dynamic strain aging in an additively manufactured nickel-base superalloy | |
Beese, Allison M.1,2; Wang, Zhuqing1; Stoica, Alexandru D.3; Ma, Dong3 | |
2019-06-11 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2018 |
卷号 | 9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Dynamic strain aging (DSA), observed macroscopically as serrated plastic flow, has long been seen in nickel-base superalloys when plastically deformed at elevated temperatures. Here we report the absence of DSA in Inconel 625 made by additive manufacturing (AM) at temperatures and strain rates where DSA is present in its conventionally processed counterpart. This absence is attributed to the unique AM microstructure of finely dispersed secondary phases (carbides, N-rich phases, and Laves phase) and textured grains. Based on experimental observations, we propose a dislocation-arrest model to elucidate the criterion for DSA to occur or to be absent as a competition between dislocation pipe diffusion and carbide-carbon reactions. With in situ neutron diffraction studies of lattice strain evolution, our findings provide a new perspective for mesoscale understanding of dislocation-solute interactions and their impact on work-hardening behaviors in high-temperature alloys, and have important implications for tailoring thermomechanical properties by microstructure control via AM. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433068200005 |
WOS关键词 | INCONEL 625 ALLOY ; LOW-CYCLE FATIGUE ; TENSILE PROPERTIES ; RATE SENSITIVITY ; SERRATED FLOW ; DEFORMATION ; MICROSTRUCTURE ; PRECIPITATION ; DISAPPEARANCE ; BEHAVIOR |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204403 |
专题 | 资源环境科学 |
作者单位 | 1.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA; 2.Penn State Univ, Dept Mech Engn, University Pk, PA 16802 USA; 3.Oak Ridge Natl Lab, Spallat Neutron Source, Neutron Scattering Div, Oak Ridge, TN 37831 USA |
推荐引用方式 GB/T 7714 | Beese, Allison M.,Wang, Zhuqing,Stoica, Alexandru D.,et al. Absence of dynamic strain aging in an additively manufactured nickel-base superalloy[J]. NATURE COMMUNICATIONS,2019,9. |
APA | Beese, Allison M.,Wang, Zhuqing,Stoica, Alexandru D.,&Ma, Dong.(2019).Absence of dynamic strain aging in an additively manufactured nickel-base superalloy.NATURE COMMUNICATIONS,9. |
MLA | Beese, Allison M.,et al."Absence of dynamic strain aging in an additively manufactured nickel-base superalloy".NATURE COMMUNICATIONS 9(2019). |
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