Effects of post-heat treatment on anisotropic mechanical properties of laser additively manufactured IN718

Zhou，Fan1,2; Hu，Xiaogang1,2; Zhou，Yang1,2; Xu，Zhen1,2; Guo，Chuan1,2; Li，Gan1,2,3; Li，Zhuoyu1,2; Huang，Yuhe1,2; Zhu，Qiang1,2

2023-06-22

10.1016/j.msea.2023.145144

Materials Science and Engineering A   影响因子和分区

0921-5093

1873-4936

In this presented work, the effects of different heat treatments on the anisotropic mechanical properties of Inconel 718 (IN718) fabricated by laser powder bed fusion (LPBF) and laser directed energy deposition (LDED) were comparatively investigated. Samples prepared in build direction (BD) and transverse direction (TD) for tensile and creep tests were heat-treated with Solution + double aging (SA) and Homogenization + solution + double aging (HSA) procedures, separately. Experimental results indicate that both SA-treated LPBF-IN718 and LDED-IN718 show strong anisotropy in tensile and creep properties. TD samples have higher tensile strength and relatively better creep performance. After HSA treatment, LPBF-IN718 samples still show strong anisotropic tensile and creep properties. In contrast, anisotropy in mechanical properties of LDED-IN718 samples is mitigated significantly. The columnar grains in as-built LDED-IN718 recrystallized after HSA treatment, resulting in similar tensile and creep properties in both directions. The difference in residual stresses of LPBF-IN718 and LDED-IN718 is the main reason that causes the totally different conditions after HSA treatment. This work can provide a deeper understanding of the difference in anisotropic mechanical properties of LPBF-IN718 and LDED-IN718, which may guide the design of proper heat treatment of laser additively manufactured nickel-based superalloy potentially.

Anisotropic mechanical properties Homogenization IN718 Laser additive manufacturing

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[52250710160];Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20210324104610029];Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20220818100613028];Science, Technology and Innovation Commission of Shenzhen Municipality[KQTD20170328154443162];

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

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

WOS:001040140400001

ELSEVIER SCIENCE SA

20232214170404

3D printing ; Additives ; Anisotropy ; Creep ; Heat treatment ; Nickel alloys

Heat Treatment Processes:537.1 ; Nickel Alloys:548.2 ; Printing Equipment:745.1.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85160407564

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,Shenzhen,518055,China
3.Department of Mechanical Engineering,City University of Hong Kong,Kowloon,Tat Chee Avenue,Hong Kong

Zhou，Fan,Hu，Xiaogang,Zhou，Yang,et al. Effects of post-heat treatment on anisotropic mechanical properties of laser additively manufactured IN718[J]. Materials Science and Engineering A,2023,877.

Zhou，Fan.,Hu，Xiaogang.,Zhou，Yang.,Xu，Zhen.,Guo，Chuan.,...&Zhu，Qiang.(2023).Effects of post-heat treatment on anisotropic mechanical properties of laser additively manufactured IN718.Materials Science and Engineering A,877.

Zhou，Fan,et al."Effects of post-heat treatment on anisotropic mechanical properties of laser additively manufactured IN718".Materials Science and Engineering A 877(2023).