材料与冶金学报Issue(4)：255-262,304,9.DOI:10.14186/j.cnki.1671-6620.2015.04.003
晶粒尺寸对大塑性变形的两相合金超塑性的影响
Influence of grain size on superplastic properties of a two-phase Pb-Sn alloy processed by severe plastic deformation
摘要
Abstract
A Pb-62% Sn eutectic alloy was processed by high-pressure torsion ( HPT) at room temperature ( RT) and then different grain sizes were introduced by subjecting samples to self -annealing for times of up to 12 days. Tensile specimens were cut from the HPT discs and then pulled to failure in order to investigate the development of superplastic properties. The results are compared with similar data reported for this alloy after processing by ECAP. It is shown that samples processed by ECAP or HPT exhibit excellent superplastic elongations at 150 ℃ and RT, respectively, and it is demonstrated also that samples with fine grains show improved ductility at faster strain rates.关键词
等通道转角挤压/高压扭转/铅锡合金/自退火/超塑性Key words
equal-channel angular pressing/high-pressure torsion/Pb-Sn alloy/self-annealing/superplasticity分类
矿业与冶金引用本文复制引用
张念先,Megumi Kawasaki,黄毅,Terence G. Langdon..晶粒尺寸对大塑性变形的两相合金超塑性的影响[J].材料与冶金学报,2015,(4):255-262,304,9.基金项目
NRF the Ministry of Education No. NRF-2014R1A1A2057697 （）
European Research Council No.267464-SPDMETALS （）
