| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2015-11-30 |
| タイトル |
|
|
タイトル |
Microscopic mechanism of plastic deformation in a polycrystalline Co?Cr?Mo alloy with a single hcp phase |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Cobalt?chromium?molybdenum alloy |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Deformation mode |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Dislocation slip |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Crystal plasticity analysis |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Geometrically necessary dislocations |
| 資源タイプ |
|
|
資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| アクセス権 |
|
|
アクセス権URI |
open access |
| 著者 |
Matsumoto, Hiroaki
Koizumi, Yuichiro
Ohashi, Tetsuya
Lee, Byong-Soo
Li, Yunping
Chiba, Akihiko
|
| 著者別名 |
|
|
|
識別子Scheme |
WEKO |
|
|
識別子 |
44811 |
|
|
識別子Scheme |
KAKEN |
|
|
識別子URI |
https://nrid.nii.ac.jp/ja/nrid/1000080312445 |
|
|
識別子 |
80312445 |
|
|
姓名 |
大橋, 鉄也 |
|
|
言語 |
ja |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
A Co–Cr–Mo alloy with a single ε (hexagonal close-packed, hcp) phase exhibits excellent tensile properties with a 0.2% proof stress of 630 MPa, an ultimate tensile stress of 1072 MPa and an elongation to fracture of 38.3%. The dominant deformation modes are basal 〈a〉 slip and prismatic 〈a〉 slip, and the apparent respective critical resolved shear stresses at room temperature are calculated to be 184 and 211 MPa. This simultaneous activation of both 〈a〉 slips can be explained in terms of the lattice constant ratio c/a of 1.610. There is a tendency for the geometrically necessary dislocations (GNDs) to accumulate at grain boundaries, and the magnitude of this GND accumulation at a particular boundary is dependent on its character. Numerical analysis using a dislocation-model-based strain gradient crystal plasticity calculation makes it possible to characterize the distributions of dislocation density, local stress and local strain in the polycrystalline ε Co–Cr–Mo alloy, and the calculation is largely consistent with the experimental results. This simulation reveals that the activity of the prismatic 〈a〉 slip in addition to the basal 〈a〉 slip contributes to the stress relaxation at the boundary. For this reason, excellent tensile ductility is obtained in the polycrystalline ε Co–Cr–Mo alloy. |
| 書誌情報 |
Acta Materialia
巻 64,
p. 1-11,
発行日 2014-02
|
| DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://doi.org/10.1016/j.actamat.2013.11.005 |
| 出版者 |
|
|
出版者 |
Elsevier |
| 著者版フラグ |
|
|
言語 |
en |
|
値 |
author |
| 出版タイプ |
|
|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
No15.pdf (1.3 MB)
