Abstract
Hardness is a crucial mechanical property to characterize the metal performance in service, and its nondestructive assessment is undoubtedly a challenging work. The objective of this paper is to realize a noncontact assessment of the heat-treated medium carbon steel by using grating laser-induced nonlinear Rayleigh waves. The generation and suppression mechanism of the instrument nonlinearity introduced by a grating laser source is explained theoretically. A different nonlinear parameter is adopted and its relevant feasibility is discussed. Ten heat-treated 45 steel samples underwent NDE using grating laser ultrasonics and the destructive testing using a Rockwell hardness tester in a successive manner. A logarithmic function is utilized to fit the correlation between the Rockwell A hardness and nonlinear parameter with a goodness of fit of 0.9102. The reasonableness of experimental fitting outcomes is discussed in the following, which confirms the potential application prospect.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
