標題: | Pseudo-Superplastic Characteristics of ZK60 Alloy with Fibrous Microstructure |
作者: | Wang, Cheng-Yu Wang, Jian-Yih Saufan, Akhmd Fu, Yen-Pei 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | ZK60 alloys;superplasticity;dynamic recovery;dynamic recrystallization;microstructure |
公開日期: | 1-一月-2018 |
摘要: | The superplasticity of ZK60 alloy was investigated after thermomechanical treatments (combination of rolling at 473 K and 673 K). ZK60 alloy, with an equiaxial grains microstructure (average grain size 2.6 mu m), showed a maximum elongation of 865.2% with the strain rate 1 x 10(-4) s(-1) under high temperature tensile test at 573 K. Surprisingly, hot-rolled ZK60 samples with fibrous microstructure also displayed pseudo-superplastic behavior with an elongation of 535.2% at the same temperature. Microstructures indicated that the hot-rolled samples with elongated grains exhibited dynamic recovery and recrystallization during high temperature deformation, transforming the fibrous to fine-grained crystals, and thus retaining pseudo-superplastic behavior. |
URI: | http://dx.doi.org/10.2320/matertrans.M2017360 http://hdl.handle.net/11536/144784 |
ISSN: | 1345-9678 |
DOI: | 10.2320/matertrans.M2017360 |
期刊: | MATERIALS TRANSACTIONS |
Volume: | 59 |
起始頁: | 674 |
結束頁: | 678 |
顯示於類別: | 期刊論文 |