| aging |
A reaction of the alloying elements taking place in the heat-treatable alloys after solution heat-treatment that brings about an increase in hardness and strength with a decrease in ductility. The reaction may occur at room temperature and is defined as natural aging. The speed of the reaction can be accelerated if it takes place at an elevated temperature in the 250
출처: www.tennalum.com/Glossary.htm
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| aging |
the slow change of oscillator frequency with time, if all other influences are held constant. The primary causes are mass transfer and stress relaxation mechanisms in the crystal unit. These can be reduced by maximizing the ratio of quartz resonator mass to contamination mass by increasing the number of the overtone, and by careful design and processing of the resonator. In a good oscillator the aging rate will tend to decrease with time. ...
출처: www.valpeyfisher.com/glossary.asp
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