• CN: 11-2187/TH
  • ISSN: 0577-6686

›› 1993, Vol. 29 ›› Issue (3): 36-39.

• Article • Previous Articles     Next Articles

SUPERPLASTICITY OF CASTING ALUMINUM BRASS

Shen Hunxiang;Gao Hhiyou;Su Shenggui;Gao Ming   

  1. Yanshan University
  • Published:1993-05-01

Abstract: This studied the superplasticity in casting large grain aluminum brass (HAL 66-6-3-2) which don’t any pretreatment. A results showed that elongation of 120% more than can obtain at deformation temperature of 520℃ to 560℃ at initial strain rate of 2.6×10-4~6.6×10-3s-1. Maximum elongation of 230% and stain rate sensitivity m- value of 0.32 were obtained under optimum deformation condition at 575℃ at initial at rain rate of 2.6×10-3s-1. Metallographic analysis showed that superplastic deformation occurred mainly in intragranular area. Superplastic deformation promot to produce subgrain in large grain end dynamic recrystallization.

Key words: Aluminum brass, Plastic deformation, Superplasticity material