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
收藏
页码：674 / 678
页数：5
相关论文
共 35 条
[11]   Improving the superplastic properties of a two-phase Mg-8% Li alloy through processing by ECAP [J].
Furui, M ;
Xu, C ;
Aida, T ;
Inoue, M ;
Anada, H ;
Langdon, TG .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 410 :439-442
[12]   Correlation of plastic deformation and dynamic recrystallization in magnesium alloy Zk60 [J].
Galiyev, A ;
Kaibyshev, R ;
Gottstein, G .
ACTA MATERIALIA, 2001, 49 (07) :1199-1207
[13]   Microstructural and mechanical characteristics of AZ61 magnesium alloy processed by high-pressure torsion (Reprinted) [J].
Harai, Yosuke ;
Kai, Masaaki ;
Kaneko, Kenji ;
Horita, Zenji ;
Langdon, Terence G. .
MATERIALS TRANSACTIONS, 2008, 49 (01) :76-83
[14]   Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion [J].
Kai, Masaaki ;
Horita, Zenji ;
Langdon, Terence G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 488 (1-2) :117-124
[15]   Developing superplastic ductilities in ultrafine-grained metals [J].
Kawasaki, Megumi ;
Figueiredo, Roberto B. ;
Xu, Cheng ;
Langdon, Terence G. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (09) :1891-1898
[16]   Review: achieving superplastic properties in ultrafine-grained materials at high temperatures [J].
Kawasaki, Megumi ;
Langdon, Terence G. .
JOURNAL OF MATERIALS SCIENCE, 2016, 51 (01) :19-32
[17]   GRAIN-BOUNDARY SLIDING AND DEFORMATION MECHANISM MAPS [J].
LUTHY, H ;
WHITE, RA ;
SHERBY, OD .
MATERIALS SCIENCE AND ENGINEERING, 1979, 39 (02) :211-216
[18]   Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP [J].
Miyahara, Y ;
Horita, Z ;
Langdon, TG .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 420 (1-2) :240-244
[19]   Grain refinement and superplasticity in a magnesium alloy processed by equal-channel angular pressing [J].
Miyahara, Y ;
Matsubara, K ;
Horita, Z ;
Langdon, TG .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (07) :1705-1711
[20]   Current status and manufacturing technologies of magnesium alloy parts in Japanese home electronics [J].
Nishikawa, Y ;
Takara, A .
THERMEC'2003, PTS 1-5, 2003, 426-4 :569-574
1234