Journal ArticleDOI
Hot rolling characteristics of spray-formed AZ91 magnesium alloy
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TLDR
In this paper, the microstructural features of the as-spray-deposited and hot-rolled alloy were examined by optical microscopy, scanning electron microscopy and X-ray diffractometry.About:
This article is published in Transactions of Nonferrous Metals Society of China.The article was published on 2007-04-01. It has received 20 citations till now. The article focuses on the topics: 5052 aluminium alloy & 6111 aluminium alloy.read more
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Microstructures and tensile properties of as-extruded Mg-Sn binary alloys
TL;DR: In this paper, the microstructure and tensile properties of the Mg-1.0%Sn-xY(x=1.5), 3.0%, 3.5%, atom fraction) alloys extruded indirectly at 350 °C were investigated by means of optical microscopy, scanning electron microscopy and a tensile test.
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Mechanical properties of ultra-fine grained AZ91 magnesium alloy processed by friction stir processing
TL;DR: In this article, the relationship of microstructure and mechanical properties in a friction stir processed (FSP) AZ91 magnesium alloy has been analyzed and compared with numerous investigations in the literature.
Journal ArticleDOI
Enhanced strength and ductility of AZ80 Mg alloys by spray forming and ECAP
Lingling Tang,Yonghao Zhao,Rinat K. Islamgaliev,Chi Y.A. Tsao,Ruslan Z. Valiev,Ruslan Z. Valiev,Enrique J. Lavernia,Yuntian Zhu,Yuntian Zhu +8 more
TL;DR: In this article, spray forming followed by equal channel angular pressing (ECAP) was employed to obtain a unique bi-modal microstructure: coarse grains were separated and surrounded by deformation networks consisting of ultrafine-grained Mg with an average grain size of 0.6µm and ellipsoidal shaped β-Mg17Al12 particles with sizes of 200-300nm.
Journal ArticleDOI
Modification of grain refinement and texture in AZ31 Mg alloy by a new plastic deformation method
TL;DR: In this paper, a severe plastic deformation technique was proposed by integrating forward extrusion and torsion deformation into a single processing step and tested its feasibility to the Mg alloys AZ31.
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Modification of the grain structure, γ phase morphology and texture in AZ81 Mg alloy through accumulative back extrusion
Abstract: The capability of accumulative back extrusion (ABE), as a recently developed severe plastic deformation technique, has been considered to modify the microstructural characteristics of a Mg–Al–Zn alloy composing higher Al content. The results indicate that applying the ABE process up to five passes led to simultaneous modification of the γ phase morphology, grain structure and deformation texture of the experimental alloy. The morphology of the eutectic γ phase has been sequentially altered from initial coarse network to elongated and finally spherical morphologies with an average globularity and diameter of 0.85 and 7.5 μm, respectively. This has been justified considering the mechanical fragmentation and thermal disintegration of the eutectic particles through necking phenomena. In addition the initial coarse grain structure of the cast alloy (~330 μm) has also been significantly refined ( d ~1 μm). This substantial grain refinement is attributed to the dynamic recrystallization enhancement in connection with pinning effect of crushed γ particles during successive passes. The typical basal texture has been modified to a weak random texture having grains with their normal distribution in a desirably wide range of deviation angles from normal direction. The occurrence of particle stimulated nucleation, particle pinning, and shear banding phenomena are suggested as the main reasons causing the weak scattered deformation texture.
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Journal ArticleDOI
Magnesium alloys and applications
TL;DR: In this article, the methods for producing magnesium are briefly described and its alloying behaviour is discussed with particular reference to the roles of individual alloying elements, and current and future trends in the use of magnesium alloys are considered together with examples of recent applications.
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TEM study of continuous precipitation in Mg-9 wt%Al-1 wt%Zn alloy
TL;DR: In this article, the development of continuous precipitate morphology in heat-treated Mg-9-wt%Al-1/1/wt%Zn alloy for a range of ageing temperatures was investigated in detail using TEM.
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Review Processing and mechanical properties of fine-grained magnesium alloys
TL;DR: In this article, fine-grained magnesium-based materials with high strength and high ductility at room temperature are obtained by grain refinement, and a very small grain size of less than 1 μm is obtained by equal channel angular extrusion.
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Twinning, dynamic recovery and recrystallization in hot worked Mg–Al–Zn alloy
TL;DR: The AZ31 Mg alloy was hot torsion tested from 180 to 450°C and from 0.01 to 1.0 s −1. The flow curves showed a peak and a decline towards a steady-state regime which were lower as temperature T rose and strain rate declined as mentioned in this paper.
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Microstructural evolution and superplasticity of rolled Mg-9Al-1Zn
T. Mohri,Mamoru Mabuchi,Mamoru Nakamura,Tadashi Asahina,Hajime Iwasaki,Tatsuhiko Aizawa,Kenji Higashi +6 more
TL;DR: In this article, microstructural evolution and superplasticity of a Mg-9Al-1Zn alloy rolled at 673 K were investigated at 573 K and 1.5×10−3 s−1.