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

2020

10.1016/j.msea.2019.138845

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

H13 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 ^oC and 700 ^oC. 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 ^oC, 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 V8C7 precipitates and the high density of dislocations. After tempering at 700 ^oC, 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 ^oC, and became a ductile fracture for the specimen after tempering at 700 ^oC. It is clarified that a transition in the microstructure explains the difference in the mechanical behavior between the specimens tempered at 600 ^oC and 700 ^oC. The present study provides a basis for manipulating the SLM-fabricated H13 for applications requiring either high strength or high ductility.
© 2019 Elsevier B.V.

H13 steel Selective laser melting Tempering Mechanical properties Microstructure

SCI ; EI

英语

第一 ; 通讯

Science and Technology Planning Project of Guangdong Province[2017B090911003] ; Shenzhen Science and Technology Innovation Commission[JCYJ20170817110331228] ; Shenzhen Science and Technology Innovation Commission[ZDSYS201703031748354]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000513985200025

Elsevier Ltd

20195207933810

Additives ; Ductile fracture ; Ductility ; High resolution transmission electron microscopy ; Mechanical properties ; Microstructure ; Selective laser melting ; Tempering ; Tensile testing ; Tool steel

Heat Treatment Processes:537.1 ; Steel:545.3 ; Optical Devices and Systems:741.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.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

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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,773.

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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,773.

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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 773(2020).