-
- Koga Norimitsu
- Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University
-
- Kumon Seiji
- Division of Mechanical Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University
-
- Watanabe Chihiro
- Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University
説明
<p>The strain distribution in the 9mass%Ni steel introduced by tensile deformation at cryogenic temperature was visualized using a digital image correlation method, and the relationship between the strain distribution and the microstructure of the steel was systematically investigated. Based on the obtained results, the factors that influence the strain distribution were discussed. In the present 9mass%Ni steel, regions consisting of tempered- and fresh-martensite and austenite (TFMA) were embedded in the tempered martensite matrix. The volume fraction of the retained austenite varied along the normal direction of the hot-rolled plates, indicating that Ni segregation occurred during the manufacturing process. As the tensile stress increased, the total elongation remained constant with decreasing temperature. Strain was introduced inhomogeneously via tensile deformation at 77 K. The high- and low-strain regions tended to be distributed in a unit of the block. It indicates that the deformability differed among the blocks. The average strain in the block (εblock) was strongly correlated with the Schmid factor of the slip system on the habit plane (SFhabit) and area fraction of TFMA in a block (AMA). The least absolute shrinkage and selection operator regression revealed that the contributions of SFhabit and AMA to εblock were nearly equal. Therefore, the deformability of the block in the 9mass%Ni steel is dominated by SFhabit and ATFMA.</p>
収録刊行物
-
- ISIJ International
-
ISIJ International 64 (2), 430-438, 2024-01-30
一般社団法人 日本鉄鋼協会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390298975426865536
-
- ISSN
- 13475460
- 09151559
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- Crossref
-
- 抄録ライセンスフラグ
- 使用不可