Grain Boundary Pop-in, Yield Point Phenomenon and Carbon Segregation in Aged Low Carbon Steel

Nanoindentation measurements, tensile tests, and carbon concentration analyses were conducted to study yield behaviors in as-received, aged, and prestrained low carbon steel. In aged sample, steel showed both yield point phenomenon (YPP) and grain boundary (GB) pop-ins besides initial pop-in, while...

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Bibliographic Details
Published inISIJ International Vol. 58; no. 2; pp. 373 - 375
Main Authors Shen, Zhengyan, Wang, Bilei, Liang, Gaofei, Zhang, Yunhu, Han, Ke, Song, Changjiang
Format Journal Article
LanguageEnglish
Published The Iron and Steel Institute of Japan 01.01.2018
Subjects
grain boundary pop-in
low carbon steel
nanoindentation
yield point phenomenon
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Summary:Nanoindentation measurements, tensile tests, and carbon concentration analyses were conducted to study yield behaviors in as-received, aged, and prestrained low carbon steel. In aged sample, steel showed both yield point phenomenon (YPP) and grain boundary (GB) pop-ins besides initial pop-in, while steels in other two states showed no YPP and only the initial pop-in. 3-dimensional atom probe (3DAP) analysis in both as-received and aged samples showed that carbon content in the matrix decreased significantly after aging treatment, which is believed to contribute to the occurrence of both YPP and GB pop-in.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.ISIJINT-2017-426