High strength (~2000 MPa) or highly ductile (~11%) additively manufactured H13 by tempering at different conditions
Yan,Jujie1,2; Song,Hui3; Dong,Yangping1; Quach,Wai Meng2; Yan,Ming1
Source PublicationMaterials Science and Engineering A
AbstractH13 is a typical high-performance tool steel, and has a wide application in the mold making industry. To optimize mechanical properties of additively manufactured H13, a detailed investigation on tempering was conducted at 600 C and 700 C. Tensile testing, transmission electron microscopy (TEM) and atom probe tomography (APT) were utilized in the present study. It was found that the selective laser melted H13 showed unsatisfactory tensile properties in the as-printed condition, especially in terms of the elongation at fracture (~2.42%). After tempering at 600 C, the tensile properties, including the ultra-high yield strength (1483 ± 48 MPa), ultimate strength (1938 ± 62 MPa) and ductility (~5.8%), were significantly improved, which was attributed to the strengthening effect mainly from the presence of a large number of fine VC precipitates and the high density of dislocations. After tempering at 700 C, the material showed a high ductility (~10.95%) and moderate tensile strength (1076 ± 21 MPa). The fracture mode was a mixed ductile-brittle fracture for the specimen after tempering at 600 C, and became a ductile fracture for the specimen after tempering at 700 C. It is clarified that a transition in the microstructure explains the difference in the mechanical behavior between the specimens tempered at 600 C and 700 C. The present study provides a basis for manipulating the SLM-fabricated H13 for applications requiring either high strength or high ductility.
KeywordH13 steel Mechanical properties Microstructure Selective laser melting Tempering
URLView the original
Scopus ID2-s2.0-85077013300
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Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorYan,Ming
Affiliation1.Department of Materials Science and Engineering and Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Civil and Environmental Engineering,University of Macau,Macau,China
3.Electron Microscopy Centre of Chongqing University,Chongqing University,Chongqing,400044,China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Yan,Jujie,Song,Hui,Dong,Yangping,et al. High strength (~2000 MPa) or highly ductile (~11%) additively manufactured H13 by tempering at different conditions[J]. Materials Science and Engineering A,2020,773.
APA Yan,Jujie,Song,Hui,Dong,Yangping,Quach,Wai Meng,&Yan,Ming.(2020).High strength (~2000 MPa) or highly ductile (~11%) additively manufactured H13 by tempering at different conditions.Materials Science and Engineering A,773.
MLA Yan,Jujie,et al."High strength (~2000 MPa) or highly ductile (~11%) additively manufactured H13 by tempering at different conditions".Materials Science and Engineering A 773(2020).
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