Correlation of Tensile Deformation-Induced Strain in HSLA Steel with Residual Stress Distribution

Journal Article · Fri Feb 15 04:00:00 EST 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-3872-6· OSTI ID:22970941

Lavanya, S.; Mukhopadhyay, C. K. ^[1]

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1. Homi Bhabha National Institute, Non-Destructive Evaluation Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research (India)

During service, due to the dynamic loading rates encountered, structural components experience varying levels of plastic deformation which leads to changes in the mechanical behavior of materials. The dynamic loading leads to non-homogenous plastic deformation which changes the residual stress distribution. In this study, the magnitude and distribution of residual stress in tensile tested specimens of high-strength low-alloy steel were investigated using x-ray diffraction technique, by varying the deformation rate. Tensile testing was performed at four different strain rates, and residual stress measurement was done along the length of the fractured specimens. Distribution of residual stress was observed all along the length of the specimens which is attributed to the varying levels of plastic deformation. Measured residual stresses are correlated with elastic strain and plastic strain obtained from the tensile tests. Consistent decrease in the magnitude of residual stress with an increase in plastic strain is observed with decreasing strain rate at the necking region. Specimen with lower yield strength experienced higher plastic strains, hence lower elastic residual stresses. The reasons for the observed distribution of residual stress are discussed with XRD peak broadening associated with plastic deformation.

• OSTI ID: 22970941
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 2 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DISTRIBUTION
DYNAMIC LOADS
LOADING RATE
LOW ALLOY STEELS
PLASTICITY
PLASTICS
RESIDUAL STRESSES
STRAIN RATE
TESTING
X-RAY DIFFRACTION
YIELD STRENGTH