Anisotropy in tensile properties and fracture behaviour of 316L stainless steel parts manufactured by fused deposition modelling and sintering

doi:10.1007/s40436-022-00402-4

Advances in Manufacturing ›› 2022, Vol. 10 ›› Issue (3): 345-355.doi: 10.1007/s40436-022-00402-4

• ARTICLES •

Anisotropy in tensile properties and fracture behaviour of 316L stainless steel parts manufactured by fused deposition modelling and sintering

Lin-Ju Wen^1,2, Xiao-Gang Hu^3,4, Zhong Li¹, Zhan-Hua Wang⁵, Ji-Kai Wu¹, Qiang Zhu^1,4

1. Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, People's Republic of China;
2. Department of Mechanical Engineering, Polytechnic University of Milan, 20156 Milan, Italy;
3. SUSTechAcademy for Advanced Interdisciplinary Studies, Shenzhen 518055, Guangdong, People's Republic of China;
4. Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials, Shenzhen 518055, Guangdong, People's Republic of China;
5. Elementplus Material Technology Co. Ltd., Shenzhen 518055, Guangdong, People's Republic of China

Received:2021-08-31 Revised:2022-03-15 Published:2022-09-08
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant No.51805238) and the Shenzhen Science and Technology Innovation Commission (Grant Nos. JCYJ202103241046100029, KQTD20170328154443162 and ZDSYS201703031748354)). The authors acknowledge the support from the Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials and Elementplus Material Technology Co. Ltd., by allowing the facilities to perform this work.

Abstract

Abstract: Fused deposition modelling and sintering (FDMS) is a potential metal additive manufacturing technology due to its low cost and high efficiency. The mixture of metal powder and binder goes through heating, extrusion, debinding and sintering processes to produce the compact finished part. However, it is generally believed that parts produced by FDMS possess poor and anisotropic tensile properties, which always attributes to the weak interlayer combination. The current work aimed to enhance tensile properties and better understand the anisotropic fracture behavior of the 316L stainless steel prepared by FDMS. By process optimization, the yield strength and ultimate tensile strength obtained in this work are increased by 26.1% and 15.2%, based on the highest performance reported in previous studies. According to the ultimate tensile strength, the performance difference between the horizontal and vertical directions has been reduced to 27%. Furthermore, the experimental results indicated that the clustered irregular shape holes evolved from primitive voids prefer to distribute in the build direction, resulting in anisotropic tensile performance. It is suggested that the mechanical properties could be improved by applying a smaller extrusion diameter and rolling-assisted printing. In addition, the current FDMS parts show qualified performance for producing the customized and small batch components.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00402-4

Key words: Fused deposition modelling, 316L stainless steel, Anisotropy, Mechanical properties, Fracture behaviour

Lin-Ju Wen, Xiao-Gang Hu, Zhong Li, Zhan-Hua Wang, Ji-Kai Wu, Qiang Zhu. Anisotropy in tensile properties and fracture behaviour of 316L stainless steel parts manufactured by fused deposition modelling and sintering[J]. Advances in Manufacturing, 2022, 10(3): 345-355.

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Anisotropy in tensile properties and fracture behaviour of 316L stainless steel parts manufactured by fused deposition modelling and sintering

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