Pseudo-Superplastic Characteristics of ZK60 Alloy with Fibrous Microstructure

被引：2

作者：

Wang, Cheng-Yu ^{[1
]}

Wang, Jian-Yih ^{[2
]}

Saufan, Akhmd ^{[2
]}

Fu, Yen-Pei ^{[2
]}

机构：

[1] Natl Chao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[2] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Hualien 97401, Taiwan

来源：

MATERIALS TRANSACTIONS | 2018年 / 59卷 / 04期

关键词：

ZK60; alloys; superplasticity; dynamic recovery; dynamic recrystallization; microstructure; HIGH-PRESSURE TORSION; LOW-TEMPERATURE SUPERPLASTICITY; ULTRAFINE-GRAINED MATERIALS; SEVERE PLASTIC-DEFORMATION; CHANNEL-ANGULAR EXTRUSION; MAGNESIUM ALLOY; DYNAMIC RECRYSTALLIZATION; ECAP; REFINEMENT; BEHAVIOR;

D O I：

10.2320/matertrans.M2017360

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：674 / 678

页数：5

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