Transactions of Materials and Heat Treatment

Title：The Strain Rate Condition for Diffusion and Transfer of Neck in Tension of Superplastic Materials

Authors： Shenyang Institute of Aeronautical Engineering Zhang Derong

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year,vol(issue):pagenumber：1991,16(3):30-32

Abstract：

According to the Hart's stability criterion an inequality which expresses the strain rate condition for diffusion and transfer of neck in tension of superplastic materials was derived in this paper. Based on it, why a large elongation can be obtained in the region Ⅱ and can not in the regions Ⅰ and Ⅲ may be explained from another side. Besides, the influence of the amount of deformation and mode of loading was analyzed briefly.

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Reference：

[1] Hart E.W., Acta metallurgica,Vol.15,1967,351-355
[2] 张德荣,沈阳航空工业学院学报,1988年1期 55-62．
[3] Stowell M.J., Cavitation in Superplasticity, p.321-336 in Paton N.E. and Hamilton (eds) Superplastic Forming of Structural Alloys, New York, 1982
[4] 何景素,王燕文,金属的超塑性,科学出版社,1986,36．

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