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Variable temperature laser light scattering microscopy studies on 10 - 100ìm size grains of gold, aluminum, zinc and titanium: Role of relaxation time in thermally triggered volume changes

P.B.Shashikanth, P.Sita Rama Rao

Laser light scattering microscopy investigations onAu,Al, Zn and Ti metal grains were made at different temperatures; a thermal volume-strain variation parameter was defined.Amodified equation for thermal expansion that took relaxation time (time needed for complete expansion due to injection of heat) into consideration was given and constancy of a constant (b), used in the modified equation was established.