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Microstructure, Mechanical Properties, and Toughening Mechanisms of a New Hot Stamping-Bake Toughening Steel
Lin, Tao; Song, Hong-Wu; Zhang, Shi-Hong; Cheng, Ming; Liu, Wei-Jie; Chen, Yun; shzhang@imr.ac.cn
2015
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume46AIssue:9Pages:4038-4046
AbstractIn this article, the hot stamping-bake toughening process has been proposed following the well-known concept of bake hardening. The influences of the bake time on the microstructure and the mechanical properties of the hot stamped-baked part were studied by means of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and mechanical tests at room temperature. The results show that the amount of the retained austenite was nearly not changed by the bake process. Also observed were spherical Cu-rich precipitates of about 15 nm in martensite laths. According to the Orowan mechanism, their contribution of the Cu-rich precipitates to the strength is approximately 245 MPa. With the increase of the bake time, the tensile strength of the part was decreased, whereas both the ductility and the product of the tensile strength and ductility were increased then decreased. The tensile strength and ductility product and the tensile strength are as high as 21.9 GPa pct, 2086 MPa, respectively. The excellent combined properties are due to the transformation-induced plasticity effect caused by retained austenite.
description.department[lin, tao ; song, hong-wu ; zhang, shi-hong ; cheng, ming ; chen, yun] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [liu, wei-jie] northeastern univ, rist, shenyang 110819, peoples r china
Funding OrganizationNational Natural Science Foundation of China [51034009]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74995
Collection中国科学院金属研究所
Corresponding Authorshzhang@imr.ac.cn
Recommended Citation
GB/T 7714
Lin, Tao,Song, Hong-Wu,Zhang, Shi-Hong,et al. Microstructure, Mechanical Properties, and Toughening Mechanisms of a New Hot Stamping-Bake Toughening Steel[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2015,46A(9):4038-4046.
APA Lin, Tao.,Song, Hong-Wu.,Zhang, Shi-Hong.,Cheng, Ming.,Liu, Wei-Jie.,...&shzhang@imr.ac.cn.(2015).Microstructure, Mechanical Properties, and Toughening Mechanisms of a New Hot Stamping-Bake Toughening Steel.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,46A(9),4038-4046.
MLA Lin, Tao,et al."Microstructure, Mechanical Properties, and Toughening Mechanisms of a New Hot Stamping-Bake Toughening Steel".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 46A.9(2015):4038-4046.
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