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Stress Distribution around Laser-Welded Cutting Wheels Using a Spherical Indentation  

Lee, Yun-Hee (Division of Quality of Life, Korea Research Institute of Standards and Science)
Lee, Wan-Kyu (Division of Quality of Life, Korea Research Institute of Standards and Science)
Jeong, In-Hyeon (Division of Quality of Life, Korea Research Institute of Standards and Science)
Nahm, Seung-Hoon (Division of Quality of Life, Korea Research Institute of Standards and Science)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.2, 2008 , pp. 125-130 More about this Journal
Abstract
A spherical indentation has been proposed as a nondestructive method of measuring local residual stress field in laser-voided joints. The apparent yield strengths interpreted from the spherical indentation data of as-welded cutting wheel were compared with the intrinsic yield strengths measured at nearly equivalent locations in annealed wheel. Their difference along the distance from the welding line is welding stress distribution because the intrinsic yield strength is invariant regardless of the elastic residual stress. The spherical indentations show that the laser-welded diamond cutting wheel displays a 10 min-wide distribution of the welding residual stress and has peak compressive and tensile stresses in the shank and tip regions, respectively.
Keywords
Laser Welds; Residual Stress; Instrumented Indentation; Apparent/intrinsic Yield Strengths; Cutting Wheel;
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