Requirements for achieving high-strain-rate superplasticity in cast aluminium alloys

被引：79

作者：

Berbon, PB ^{[1
]}

Furukawa, M

Horita, Z

Nemoto, M

Tsenev, NK

Valiev, RZ

Langdon, TG

机构：

[1] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[2] Univ So Calif, Dept Mech Engn, Los Angeles, CA 90089 USA

[3] Fukuoka Univ Educ, Dept Technol, Fukuoka 81141, Japan

[4] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 81281, Japan

[5] Ufa State Aviat Tech Univ, Inst Chem Technol, Ufa 450062, Russia

[6] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1998年 / 78卷 / 04期

关键词：

D O I：

10.1080/095008398177896

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Equal-channel angular (ECA) pressing has been used to introduce a very small grain size into a commercial cast Al-Mg-Li-Zr alloy. Tensile testing reveals the potential for achieving superplastic ductilities in this alloy at very high strain rates (greater than 10(-2) s(-1)) but experiments show that this potential is realized only if a sufficiently high strain is introduced during the ECA pressing such that the microstructure is homogeneous and consists of an array of grains having large-angle grain boundaries.

引用

页码：313 / 318

页数：6

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