Application of Instrumented Indentation Technique to Evaluate Residual Stress and Stress Directionality

Abstract:

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The instrumented indentation technique (IIT) is a powerful method for evaluating mechanical properties of materials such as elastic modulus, tensile strength, fracture toughness and residual stress. Especially, IIT is a promising alternative to conventional methods of residual stress measurement such as hole drilling, saw cutting, X-ray/neutron diffraction, and ultrasonic methods because of its various advantages of nondestructive specimen preparation, easy process, characterization of material properties on local scales and measurement of in-service structures. Evaluation of residual stress using IIT is based on the key concepts that the deviatoric-stress part of the residual stress affects the indentation load-depth curve and that the quantitative residual stress in a target region can be evaluated by analyzing the difference between the residual stress-induced indentation curve and residual stress-free curve. To verify the applicability of the suggested technique, indentation tests were performed on the welded zone.

Info:

Periodical:

Key Engineering Materials (Volumes 385-387)

Edited by:

H.S. Lee, I.S. Yoon and M.H. Aliabadi

Pages:

889-892

DOI:

10.4028/www.scientific.net/KEM.385-387.889

Citation:

M. J. Choi et al., "Application of Instrumented Indentation Technique to Evaluate Residual Stress and Stress Directionality ", Key Engineering Materials, Vols. 385-387, pp. 889-892, 2008

Online since:

July 2008

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Price:

$35.00

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