Control of crack propagation on SUS316 plate by laser-induced patterning: heat treatment and cladding
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DOI 10.1007/s12206-020-1028-0
Journal of Mechanical Science and Technology 34 (11) 2020 Original Article DOI 10.1007/s12206-020-1028-0 Keywords: · Laser heat treatment · Cladding · Patterning · Crack propagation · Crack-growth-proof safety zone
Control of crack propagation on SUS316 plate by laser-induced patterning: heat treatment and cladding Yeong-Kwan Jo1, Jae-Hyun Yu2, Ki-Yong Lee3, Do-Sik Shim4 and Sang-Hu Park5 1
Graduate School of Mechanical Engineering, Pusan National University, Busan 46241, Korea, 3 Advanced Surface Process Group, KITECH, Yangsan 50623, Korea, Smart Mobility Material Parts R&D 4 Group, KITECH, Gwangju 61007, Korea, Division of Mechanical Engineering-Major of Marine Equip5 ment, Korea Maritime and Ocean University, Busan 49112, Korea, School of Mechanical Engineering, Pusan National University, Busan 46241, Korea 2
Correspondence to: Sang-Hu Park [email protected]
Citation: Jo, Y.-K., Yu, J.-H., Lee, K.-Y., Shim, D.S., Park, S.-H. (2020). Control of crack propagation on SUS316 plate by laserinduced patterning: heat treatment and cladding. Journal of Mechanical Science and Technology 34 (11) (2020) 4711~4719. http://doi.org/10.1007/s12206-020-1028-0
Received March 18th, 2020 Revised
August 4th, 2020
Accepted August 12th, 2020 † Recommended by Editor Hyung Wook Park
Abstract
A practical method is proposed to control the direction of crack propagation and to generate a crack-growth-proof (CGP) zone on a metal plate using laser induced line patterns: heat treatment and cladding. To evaluate the effect on crack propagation by the line patterns, we fabricated and tested diverse line-pattern shapes on a thin SUS316 plate of 1 mm thickness, such as single vertical line; one, three, and five horizontal lines; one and three 45ºtilted lines; X-shaped lines; and rectangular box lines by both laser heat treatment and cladding process. For description of metallurgical change via the pattern and its effect on the crack growth, we did a microstructural analysis of the treated SUS316 specimen. For example, ultimate tensile stress (σu) and fracture strain changed according to the pattern shapes. A specimen treatiing a rectangular line pattern of 4×20 mm showed an increase of σu to about 8.8 %, and fracture strain also increased by 10 % compared to that of a SUS316 plate. Through this work, we verified that the CGP zone could be controlled on a thin metal plate using the proposed method for protection of highly valuable mechanical parts mounted on it.
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Surface treatment technologies have been developed and applied to obtain high level characteristics such as wear-proof, corrosion-proof, higher strength, and others in diverse industrial fields [1]. Generally, cracks are formed and propagated on thin metal plates when an external force is overloaded, which could cause further damage to expensive mechanical parts mounted on the plate [2]. For these reasons, there is a great n
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