Cold spray additive manufacturing of Invar 36 alloy: microstructure,thermal expansion and mechanical properties

Chaoyue Chen ¹Yingchun Xie ²Longtao Liu ¹Ruixin Zhao ¹Xiaoli Jin ³Shanqing Li ³Renzhong Huang ²Jiang Wang ¹Hanlin Liao ⁴Zhongming Ren¹

扫码查看

作者信息

1. State Key Laboratory of Advanced Special Steels, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
2. Guangdong Academy of Science, Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, The Key Lab of Guangdong for Modern Surface Engineering Technology, Guangzhou 510651, China
3. Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 200431, China
4. ICB UMR 6303, CNRS, Univ.Bourgogne Franche-Comté, UTBM, F-90010 Belfort, France
折叠

Abstract

In this work,the Invar 36 alloys were manufactured using cold spray (CS) additive manufacturing technique.The systematic investigations were made on the microstructural evolution,thermal expansion and mechanical properties under as-sprayed (AS) and heat-treated (HT) conditions.XRD (X-ray diffraction)and ICP-AES (inductively coupled plasma atomic emission spectroscopy) analyses show that no phase transformation,oxidation,nor element content change have occurred.The X-ray computed tomography (XCT) exhibited a near fully dense structure with a porosity of 0.025％ in the helium-produced sample under as-sprayed condition,whereas the nitrogen-produced samples produced at 5 MPa and 800 ℃ show more irregular pore defects.He-AS sample shows a more prominent grain refinement than that of nitrogen samples due to the more extensive plastic deformation.The post heat-treatment exhibited a promoted grain growth,inter-particle diffusion,as well as the formation of annealing twins.Between 25 ℃ and 200 ℃,the nitrogen samples possessed lower CTE (coefficient of thermal expansion) values (1.53 × 10-6/℃) compared with those produced by casting and laser additive manufacturing.The He-AS samples exhibited a noticeable negative CTE value between 25 ℃ and 200 ℃,which may due to the significant compressive residual stress (-272 MPa) compensating its displacement with temperature increase during CTE test.The N2-HT and He-HT Invar 36 samples present a notable balance between strength and ductility.In conclusion,the CS technique can be considered as a potential method to produce the Invar 36 component with high thermal and mechanical performance.

Key words

Cold spray/Additive manufacturing/Invar 36 alloy/Coefficient of thermal expansion/Tensile test

引用本文复制引用

基金项目

This work was supported financially by the National Key Research and Development Program of China(2019YFA0705300)

Guangdong Special Support Program(2019BT02C629)

National Natural Science Foundation of China(51690160)

Shanghai Science and Technology Committee(19DZ1100704)

Shanghai Sailing Program(19YF1415900)

Golden Apple Project of Baosteel Co ,Ltd(A19EC13500)

Guangdong Basic and Applied Basic Research Foundation(2019B1515120016)

Guangzhou Science and Technology Program(202002030290)

Guangzhou Science and Technology Program(202007020008)

GDAS' Project of Science and Technology Development(2019GDASYL-0503006)

GDAS' Project of Science and Technology Development(2020GDASYL-20200302011)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

被引量4

参考文献量63

段落导航