Simultaneous enhancements of strength and ductility of a selective laser melted H13 steel through inoculation treatment

Tan，Qiyang1; Chang，Haiwei1; Yin，Yu1; Wang，Feng2; Huang，Danni1,3; Liang，Guofang1; Wu，Tao2; Yan，Ming3; Cheng，Xing3; Zhang，Ming Xing1

2022-10-01

10.1016/j.scriptamat.2022.114874

SCRIPTA MATERIALIA   Impact Factor & Quartile

1359-6462

1872-8456

Recent studies have confirmed that the high brittleness and property anisotropy of the selective laser melting (SLM) fabricated H13 tool steel are attributed to the presence of elongated, unstable high carbon gamma (austenite) thin films in between the columnar structures. To overcome this problem, TiN nanoparticles (0.5 wt.%) were used as an inoculator to promote heterogeneous nucleation of the prior gamma-grains, converting the columnar structure into equiaxed and refined grains. As a result, the finer alpha'-blocks formed upon the subsequent martensitic transformation. This not only leads to the elimination of the property anisotropy, but also simultaneously increases the strength (tensile strength of 2051 +/- 48 MPa) and ductility (elongation of 7.4 +/- 0.7%) of the SLM-fabricated H13 steel. The present work forms a significant step towards to fabricating high-performance tool steels using the SLM technique.

Selective laser melting Steels Grain refinement EBSD SEM

SCI ; EI

English

Others

HBIS-UQ Innovation Centre for Sustainable Steel (ICSS)[ICSS2020-02]

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

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

WOS:000833347200003

PERGAMON-ELSEVIER SCIENCE LTD

20222512241661

Anisotropy ; Carbon films ; Ductility ; Fracture mechanics ; Grain refinement ; Linear transformations ; Martensitic transformations ; Melting ; Tensile strength ; Textures ; Tool steel

Metallography:531.2 ; Steel:545.3 ; Chemical Operations:802.3 ; Coating Materials:813.2 ; Mathematical Transformations:921.3 ; Mechanics:931.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystal Growth:933.1.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85131965547

Web of Science

1.School of Mechanical and Mining Engineering,The University of Queensland,St. Lucia,4072,Australia
2.HBIS Group,Shijiazhuang,Hebei,050023,China
3.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

Tan，Qiyang,Chang，Haiwei,Yin，Yu,et al. Simultaneous enhancements of strength and ductility of a selective laser melted H13 steel through inoculation treatment[J]. SCRIPTA MATERIALIA,2022,219.

Tan，Qiyang.,Chang，Haiwei.,Yin，Yu.,Wang，Feng.,Huang，Danni.,...&Zhang，Ming Xing.(2022).Simultaneous enhancements of strength and ductility of a selective laser melted H13 steel through inoculation treatment.SCRIPTA MATERIALIA,219.

Tan，Qiyang,et al."Simultaneous enhancements of strength and ductility of a selective laser melted H13 steel through inoculation treatment".SCRIPTA MATERIALIA 219(2022).