A significant feature of alloys is the surfaces hardness that is always accompanied by challenges when it’s measured by common mechanical techniques. In this investigation. we used Laser Induced Breakdown Spectroscopy (LIBS) as a replacement method for common mechanical techniques to measure the surfaces hardness of different alloys. After recording the spectrum of alloy samples... https://www.spidertattooz.com/Antiqued-Brass-Color-Glue-On-Bar-Pin-Back-1-1-4-Inch-32mm-10-Pieces/