Study on Plastic Deformation Characteristics of Shot Peening of Ni-Based Superalloy GH4079

International Conference on Materials Sciences and Nanomaterials

材料科学;物理学

Zhong, L.Q.^1,2 ; Liang, Y.L.^3 ; Hu, H.^1

School of Mechanical Engineering, Guizhou University, People's Republic of China1 College of Mechanical Engineering, Guizhou University, Guiyang, Guiyang, Guizhou, China^1

School of Mechanical Engineering, Guiyang University, Guiyang, Guizhou, China^2

School of Material and Metallurgy, Guizhou University, Guiyang, Guizhou, China^3

关键词: Deformation Characteristics;    Field emission scanning electron microscopes;    Microhardness tester;    Ni-based superalloys;    Residual compressive stress;    Shot peening intensity;    Shot peening parameters;    Surface residual stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/230/1/012041/pdf
DOI  :  10.1088/1757-899X/230/1/012041

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, the X-ray stress diffractometer, surface roughness tester, field emission scanning electron microscope(SEM), dynamic ultra-small microhardness tester were used to measure the surface residual stress and roughness, topography and surface hardness changes of GH4079 superalloy, which was processed by metallographic grinding, turning, metallographic grinding +shot peening and turning + shot peening. Analysized the effects of shot peening parameters on shot peening plastic deformation features; and the effects of the surface state before shot peening on shot peening plastic deformation characteristics. Results show that: the surface residual compressive stress, surface roughness and surface hardness of GH4079 superalloy were increased by shot peening, in addition, the increment of the surface residual compressive stress, surface roughness and surface hardness induced by shot peening increased with increasing shot peening intensity, shot peening time, shot peening pressure and shot hardness, but harden layer depth was not affected considerably. The more plastic deformation degree of before shot peening surface state, the less increment of the surface residual compressive stress, surface roughness and surface hardness induced by shot peening.