Growth of recrystallization nuclei in rapidly heated L62 brass

Abstract

1. One of the criteria for estimating the recrystallization capacity of a material is the recrystallization temperature, determined by the temperature of the beginning of primary recrystallization, the range of temperatures in which it occurs, and the degree of recrystallization in this range. 2. From the experimental data we constructed a three-dimensional diagram of the recrystaltization of L62 brass with 30–60% prior strain during induction heating at rates of 100–2000 degrees/sec. 3. An increase of the heating rate promotes intense refinement of the structure toward the end of primary recrystallization. At the same time, beginning at heating rates of 100–250 degrees/sec, further increase of the heating rate up to 2000 degrees/sec has little effect on the final grain size resulting from primary recrystallization of brass at all the degrees of prior cold working investigated. 4. On heating at rates above 400–500 degrees/sec and rapid cooling the primary recrystallization is completed at higher temperatures. The temperature of the end of recrystallization does not depend on the cooling rate if the cooling rate is at least double the heating rate.