Synchronous-hammer-forging-assisted laser directed energy deposition additive manufacturing of high-performance 316L samples

Wu，Dongjiang1; Yu，Chengshui1; Wang，Qiyong1; Niu，Fangyong1; Ma，Guangyi1; Wang，Hong2; Zhou，Cong3; Zhang，Bi3

2022-09-01

10.1016/j.jmatprotec.2022.117695

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   Impact Factor & Quartile

0924-0136

1873-4774

Plastic-deformation-assisted method has positive effect on regulating microstructure and mechanical properties of additive manufacturing (AM) metal samples. However, when fabricating weakly rigid metal samples by laser directed energy deposition (LDED), there are great limitations in the applicability and process flexibility of the commonly used rolling deformation auxiliary methods, which needs to be further improved. In this study, a synchronous-hammer-forging-assisted laser directed energy deposition (SHLDED) method is developed, and the effect of synchronous-hammer-forging on the microstructure and mechanical properties of LDED-processed 316L stainless steel samples is investigated. The results show that large plastic deformation up to 21 % of deposited materials can be achieved using a small hammering force of 55 N. Compared with LDED sample, the microstructure of SHLDED sample shows obvious equiaxed grains and refinement effect. The maximum intensity of the pole figure decreases by 50 % and the average grain size decreases by 69 %. Owing to the combined effect of grain refinement and work hardening, the yield strength (YS), ultimate tensile strength (UTS), and microhardness of SHLDED sample reach 494 +/- 19 MPa, 677 +/- 7 MPa, and 243 +/- 11 HV0.2, respectively, which are 41 %, 10 %, and 22 % higher than those of LDED sample. This study provides a new method for microstructure and mechanical properties regulation of LDED metal samples.

Additive manufacturing Laser directed energy deposition Metal 316L Microstructure Hybrid AM processes

SCI ; EI

English

Others

National Natural Science Foundation of China["51805070","51790172","52175291"] ; Liaoning Province Natural Science Foundation[2020-BS-057] ; Fundamental Research Funds for the Central Universities[DUT19RC (3) 060] ; Shenzhen Science and Technology Innovation Commission[JSGG20210420091802007]

Engineering ; Materials Science

Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary

WOS:000821791900002

ELSEVIER SCIENCE SA

20222812352055

3D printers ; Additives ; Deposition ; Forging ; Grain refinement ; Grain size and shape ; Hammers ; Plastic deformation ; Strain hardening ; Tensile strength ; Textures

Metal Forming Practice:535.2.2 ; Heat Treatment Processes:537.1 ; Small Tools, Unpowered:605.2 ; Printing Equipment:745.1.1 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803

MATERIALS SCIENCE

2-s2.0-85133751428

Web of Science

1.Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Dalian,Liaoning Province,116024,China
2.Department of Spine Surgery,Dalian Municipal Central Hospital Affiliated of Dalian Medical University,Dalian,116033,China
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wu，Dongjiang,Yu，Chengshui,Wang，Qiyong,et al. Synchronous-hammer-forging-assisted laser directed energy deposition additive manufacturing of high-performance 316L samples[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2022,307.

Wu，Dongjiang.,Yu，Chengshui.,Wang，Qiyong.,Niu，Fangyong.,Ma，Guangyi.,...&Zhang，Bi.(2022).Synchronous-hammer-forging-assisted laser directed energy deposition additive manufacturing of high-performance 316L samples.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,307.

Wu，Dongjiang,et al."Synchronous-hammer-forging-assisted laser directed energy deposition additive manufacturing of high-performance 316L samples".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 307(2022).