Journal ArticleDOI
High strain rate superplasticity in a commercial Al–Mg–Sc alloy
TLDR
In this article, it was shown that an Al−5.7%Mg−0.3%Mn alloy subjected to severe plastic deformation through equal-channel angular extrusion exhibits superior superplastic properties in the temperature range of 250-500 °C at strain rates ranging from 1.4×−10−5 to 1.5×−1 s−1 with a maximum elongation-to-failure of 2000% recorded at 450 °C and an initial strain rate of 5.6About:
This article is published in Scripta Materialia.The article was published on 2004-02-01. It has received 101 citations till now. The article focuses on the topics: Superplasticity & Strain rate.read more
Citations
More filters
Journal ArticleDOI
Principles of equal-channel angular pressing as a processing tool for grain refinement
TL;DR: In this article, a review examines recent developments related to the use of ECAP for grain refinement including modifying conventional ECAP to increase the process efficiency and techniques for up-scaling the procedure and for the processing of hard-to-deform materials.
Journal ArticleDOI
Grain refinement and superplastic flow in an aluminum alloy processed by high-pressure torsion
Sergey V. Dobatkin,Elena N. Bastarache,Genki Sakai,Takeshi Fujita,Zenji Horita,Terence G. Langdon +5 more
TL;DR: In this article, high-pressure torsion (HPT) was used to refine Al-3% Mg-0.2% Sc alloy to refine the grain size to ∼ 0.15mm.
Journal ArticleDOI
Relationship between texture and low temperature superplasticity in an extruded AZ31 Mg alloy processed by ECAP
TL;DR: In this article, the development of low temperature superplasticity and texture is examined in an AZ31 Mg alloy after extrusion and processing by equal-channel angular pressing (ECAP).
Journal ArticleDOI
Low temperature superplasticity in a friction-stir-processed ultrafine grained Al–Zn–Mg–Sc alloy
Indrajit Charit,Rajiv S. Mishra +1 more
TL;DR: In this paper, the authors used friction stir processing (FSP) to create a microstructure with ultrafine grains (0.68-μm grain size) in an as-cast Al 8.9Zn-2.09Sc (wt.%) alloy.
Journal ArticleDOI
Superplastic Deformation Mechanism of an Ultrafine-grained Aluminum Alloy Produced by Friction Stir Processing
TL;DR: In this paper, a superplastic deformation mechanism map for FSP aluminum alloys is proposed, which reveals the presence of threshold stress, a stress exponent of 2, an inverse grain size dependence of 2 and an activation enemy of 142 kJ mol(-1).
References
More filters
Journal ArticleDOI
Influence of scandium and zirconium on grain stability and superplastic ductilities in ultrafine-grained Al-Mg alloys
Sungwon Lee,A. Utsunomiya,Hiroki Akamatsu,Koji Neishi,Minoru Furukawa,Zenji Horita,Terence G. Langdon +6 more
TL;DR: Experiments were conducted to evaluate the grain refinement introduced by equal-channel angular pressing (ECAP) in three different Al-3% Mg alloys containing either 2% Sc, 2% Zr or a combination of 2%Sc and Zr as mentioned in this paper, but superplasticity was not achieved in the Al-Mg-Zr alloy due to the onset of rapid grain growth at 573 K.
Journal ArticleDOI
Superplastic forming at high strain rates after severe plastic deformation
TL;DR: An Al-3% Mg-0.2% Sc alloy was fabricated by casting and subjected to severe plastic deformation through equal-channel angular pressing to a strain of ~8.2?m and increased to?1.1?m when holding at 673 K for 10 min this article.
Journal ArticleDOI
New Al–Mg–Sc alloys
TL;DR: In this article, the authors presented data on new wrought weldable alloys based on the Al-Mg-Sc system, namely, 01515, 01523, 01535, 01545, 01570 and 01571, which differ from each other mainly by magnesium content and belong to the family of non-heat-treatable Alloy alloys.
Book
Superplasticity of Alloys, Intermetallides and Ceramics
TL;DR: In this paper, the authors investigated the role of different deformation mechanisms in superplastic flow and the nature of the initial microstructure of a given material, and they proposed a new model of structural and morphological deformation.