Enhancement of plastic anisotropy and drastic increase in yield stress of Mg-Li single crystals by Al-addition followed by quenching

被引：21

作者：

Hagihara, Koji ^{[1
]}

Mori, Keitaro ^{[1
]}

Nakano, Takayoshi ^{[2
]}

机构：

[1] Osaka Univ, Dept Adapt Machine Syst, Grad Sch Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

来源：

SCRIPTA MATERIALIA | 2019年 / 172卷

基金：

日本学术振兴会;

关键词：

Mg-alloys; Orientation dependence; Strengthening; Dislocation; Single crystal; MECHANICAL-PROPERTIES; ALLOYS; MAGNESIUM; BEHAVIOR;

D O I：

10.1016/j.scriptamat.2019.07.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Strong orientation dependence of yield stress was found in a body-centered cubic (bcc)-structured Mg-Li alloy single crystal by adding 5 at.% of Al combined with rapid quenching, which was negligible in Mg-Li binary single crystals. Furthermore, the addition of 5 at.% of Al combined with rapid quenching caused an extreme increase in yield stress up to similar to 470 MPa; this compares to similar to 50 MPa in a Mg-Li binary crystal. Increased valence-electron to atom ratio and development of chemical modulation in the alloy by Al-addition are probable causes of the enhancement of plastic anisotropy and the drastic increase in yield stress, respectively. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：93 / 97

页数：5

共 21 条

[1] Electrochemical behavior of Mg-Li, Mg-Li-Al and Mg-Li-Al-Ce in sodium chloride solution [J].

Cao, Dianxue ;

Wu, Lin ;

Sun, Yong ;

Wang, Guiling ;

Lv, Yanzhuo .

JOURNAL OF POWER SOURCES, 2008, 177 (02) :624-630

[2] Using ab initio calculations in designing bcc Mg-Li alloys for ultra-lightweight applications [J].

Counts, W. A. ;

Friak, M. ;

Raabe, D. ;

Neugebauer, J. .

ACTA MATERIALIA, 2009, 57 (01) :69-76

[3] Plastic anisotropy in bcc transition metals [J].

Duesbery, MS ;

Vitek, V .

ACTA MATERIALIA, 1998, 46 (05) :1481-1492

[4] Effect of long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy [J].

Hagihara, K. ;

Kinoshita, A. ;

Sugino, Y. ;

Yamasaki, M. ;

Kawamura, Y. ;

Yasuda, H. Y. ;

Umakoshi, Y. .

ACTA MATERIALIA, 2010, 58 (19) :6282-6293

[5] Isotropic plasticity of β-type Ti-29Nb-13Ta-4.6Zr alloy single crystals for the development of single crystalline β-Ti implants [J].

Hagihara, Koji ;

Nakano, Takayoshi ;

Maki, Hideaki ;

Umakoshi, Yukichi ;

Niinomi, Mitsuo .

SCIENTIFIC REPORTS, 2016, 6

[6] Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions [J].

Hagihara, Koji ;

Okubo, Masayoshi ;

Yamasaki, Michiaki ;

Nakano, Takayoshi .

CORROSION SCIENCE, 2016, 109 :68-85

[7]

Hatta H., 1997, Journal of Japan Institute of Light Metals, V47, P195, DOI 10.2464/jilm.47.195

[8]

Kitajima S., 1968, J JAPAN I METALS, V32, P164

[9] Magnesium and its alloys applications in automotive industry [J].

Kulekci, Mustafa Kemal .

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2008, 39 (9-10) :851-865

[10] Microstructural and Orientation Dependence of the Plastic Deformation Behavior in β-type Ti-15Mo-5Zr-3Al Alloy Single Crystals [J].

Lee, Sang-Hoon ;

Hagihara, Koji ;

Nakano, Takayoshi .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2012, 43A (05) :1588-1597

← 1 2 3 →