Abstract
The study of correlation between hardness of aluminum alloys and properties of laser plume are presented in this article. The negative relationship between opto-acoustic signal or crater volume and hardness was observed. It was found at the first time that the mechanical properties of analyzed sample correlate with ablated mass quietly different during laser crater formation. The temporal evolution of laser plume emission in dependence on hardness of alloys are studied as well as. So, the temperature calculated by lithium transition strongly depends on hardness, while the temperature for aluminum does not correlate with properties of alloys. It is supposed to use opto-acoustic signal and Al I emission signal either for correcting the interferences from sample matrix or for controlling the hardness of alloy during its heat hardening.
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