Hardness and tensile properties of metals subjected to aging conditions
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Authors
Talarico, P.M.
Kwon, Y.W.
Subjects
Metals
Hardness
Micro-indentation
Aging condition
Hardness
Micro-indentation
Aging condition
Advisors
Date of Issue
2020
Date
2020
Publisher
Springer
Language
en_US
Abstract
Many metals used in engineering applications are exposed to aging conditions such as ultraviolet radiation and moisture. Aged metals are expected to lose their designed mechanical properties, and it was desired to relate a degraded local property to other homogenous properties. To study the aging effect, steel and aluminum were tested with reproduced variables in an accelerated weather testing chamber. Multiple tensile specimens of steel and aluminum were created to undergo accelerated Q-Lab Ultraviolet testing in the presence of radiation, heat and moisture. Accelerated aging resulted in decreasing surface hardness correlating with the tensile strength and elastic modulus for both steel and aluminum. The study also investigated the change in hardness through the depth of specimens resulting from aging, exhibited more consistently in steels. The overall strongest correlations existed in steels, between surface hardness and tensile strength, analogous to other studies. Modeling linear relationships for metal lifetime forecasts from hardness has been supported by this study. Outcomes can be expanded upon with more elaborate finite element analysis if desired in future experimentation.
Type
Article
Description
The article of record as published may be found at https://doi.org/10.1007/s41939-020-00067-1
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Identified in text as U.S. Government work.
Format
14 p.
Citation
Talarico, P. M., and Y. W. Kwon. "Hardness and tensile properties of metals subjected to aging conditions." Multiscale and Multidisciplinary Modeling, Experiments and Design (2020): 1-14.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.