Tight Hammering for Plastic Zone of Materials

2018 5th International Conference on Advanced Engineering and Technology

工业技术（总论）

Yingwei, Wang^1 ; Zhongnan, M.A.^1 ; Xin, Dong^1 ; Qingguang, Y.A.N.^1 ; Jinzhu, G.A.O.^2 ; Xiuying, G.A.I.^2

Jilin University, Changchun

130022, China^1

Institute of Metals, Chinese Academy of Sciences, Shenyang

110016, China^2

关键词: Boundary points;    Complex components;    Curvature radii;    Curved surfaces;    Laser scanning microscope;    Least squares fitting;    Plastic deformation zone;    Plastic zones;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/507/1/012004/pdf
DOI  :  10.1088/1757-899X/507/1/012004

学科分类：工业工程学

来源: IOP

【 摘 要 】

Considering the failure due to cracks and peeling from curved surfaces of complex components, we used the tight hammering method to study the internal plastic deformation zones of curved-surface Q235 steel specimens after hammering shock and display relevant information. A Dino-capture microscope and a ZEISS LSM 700 laser scanning microscope were used to obtain and fit the morphologic data of rebounded zones and identify effective boundary points. Data of the boundary points were processed by least squares fitting. After curved-surface specimens of different curvature radii and planar specimens were hammered by the SR5.5 punch head and the plastic zones on the tight curved surfaces were all circularly-shaped at different impact strokes. The hammer traces were symmetrical spatially, indicating the internal plastic zones of the tight curved-surface specimens were approximately spherically-shaped. Deformations of plastic zones at external corners were large in magnitude and small in area, while those at internal corners were small in magnitude and large in area.