Effects of manganese addition on microstructure and press formability of hot-rolled Mg–Al–Zn alloy sheets

2008 ◽  
Vol 23 (11) ◽  
pp. 3029-3039 ◽  
Author(s):  
Xinsheng Huang ◽  
Kazutaka Suzuki ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Az31 Alloy ◽  
Solubility Limit ◽  
Solid Solubility Limit ◽  
Homogeneous Microstructure ◽  
Texture Intensity ◽  
Differential Speed Rolling ◽  
Hot Rolled ◽  
Mn Additions ◽  
Zn Alloy ◽  
Differential Speed

Differential speed rolling (DSR) has been carried out on AZ31 alloys with Mn additions of 0 to 0.6 wt% for investigating the effects of Mn on microstructure, texture, mechanical properties, and formability. The Al–Mn compounds were formed in the sample with a Mn addition of only 0.2 wt% because of its low solid-solubility limit. There were tiny differences among the DSR-processed AZ31 alloys with different Mn contents, while the AZ31 alloy without Mn addition exhibited a more homogeneous microstructure, a weaker basal texture intensity, and a much superior formability together with a larger likelihood of grain growth during annealing. The Mn dissolving in αMg matrix exerted a far stronger influence on the resulting properties compared with those existing in form of the Al–Mn compounds. The Mn solute atoms induced an increase in c/a ratio, which may suppress activity of nonbasal slips and in turn degrade the deformation capability.

Mechanical properties of Mg–Al–Zn alloy with a tilted basal texture obtained by differential speed rolling

2008 ◽  
Vol 488 (1-2) ◽  
pp. 214-220 ◽  
Author(s):  
Xinsheng Huang ◽  
Kazutaka Suzuki ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Mechanical Properties ◽  
Basal Texture ◽  
Differential Speed Rolling ◽  
Zn Alloy ◽  
Differential Speed

Texture and Microstructure Control of Cu and Cu-Zn Alloy by Differential Speed Rolling

Copper ◽  
2007 ◽  
pp. 44-49
Author(s):  
Tetsuo Sakai ◽  
Junya Watanabe ◽  
Naoaki Iwamoto ◽  
Hiroshi Utsunomiya
Keyword(s):  
Microstructure Control ◽  
Differential Speed Rolling ◽  
Zn Alloy ◽  
Differential Speed

Microstructure Development and Related Mechanical Behavior of the ZEW200 Mg Alloy Processed by Differential Speed Rolling and Equal Channel Angular Pressing

2018 ◽  
Vol 941 ◽  
pp. 931-936 ◽  
Author(s):  
José Victoria-Hernández ◽  
Gerrit Kurz ◽  
Joungsik Suh ◽  
Dietmar Letzig
Keyword(s):  
Mechanical Behavior ◽  
Shear Deformation ◽  
Equal Channel Angular Pressing ◽  
Thermomechanical Processing ◽  
Mg Alloy ◽  
Rolled Sheet ◽  
Texture Intensity ◽  
Angular Pressing ◽  
Differential Speed Rolling ◽  
Differential Speed

The present work investigates the influence of shear deformation on microstructural-texture and mechanical behavior of ZEW200 Mg alloy sheets. For the introduction of extra shear deformation during thermomechanical processing, the separate effect of differential speed rolling (DSR) and equal channel angular pressing (ECAP) were analyzed. The results were compared with the microstructure and mechanical behavior of equal speed rolled (ESR) ZEW200 sheets. No significant texture changes were observed after the utilization of DSR, while ECAP processing was effective in changing the character of the texture and reducing the texture intensity. The large yield stress asymmetry observed in the rolled sheet is strongly reduced in the ECAP processed sheets. Results showed the potential to use shear deformation to modify the crystallographic texture via the profuse activation of {10-12}<10-11> extension twins. The presence of a large twin fraction of the microstructure modified the work hardening behavior of the processed sheets due to the further activation of basal <a> slip. The application of extra shear deformation to tailor the texture during processing is, therefore, an alternative to optimize the deformation behavior of already formable Mg alloys.

Effects of Differential Speed Rolling on Microstructure and Mechanical Properties of AZ31 Magnesium Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 1759-1763 ◽  
Author(s):  
Xin Sheng Huang ◽  
Kazutaka Suzuki ◽  
Yong Jai Kwon ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Bands ◽  
Rolling Direction ◽  
Az31 Alloy ◽  
Speed Ratio ◽  
Rolled Sheet ◽  
Proof Stress ◽  
Tensile Direction ◽  
Differential Speed Rolling ◽  
Differential Speed

A differential speed rolling (DSR) processing with a roll speed ratio of 1.167 was carried out on an AZ31 alloy for investigating the effects of DSR on microstructure, texture and mechanical properties. The DSR processed sheet showed unidirectional shear bands with a small grain size of 5.5 μm inclining to the rolling direction, and the basal plane tended to incline at about 15º from the rolling plane toward the rolling direction. Compared with the normal rolled sheet, the DSR processed sheets showed a lower proof stress and a larger elongation with an increase from 21% to 26% in the rolling direction. The proof stress increased and the elongation decreased with the angle between the tensile direction and the rolling direction.

Microstructure and texture of Mg–Al–Zn alloy processed by differential speed rolling

2008 ◽  
Vol 457 (1-2) ◽  
pp. 408-412 ◽  
Author(s):  
Xinsheng Huang ◽  
Kazutaka Suzuki ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Differential Speed Rolling ◽  
Zn Alloy ◽  
Differential Speed

Influences of Rolling Conditions on Texture and Formability of Magnesium Alloy Sheets

2010 ◽  
Vol 638-642 ◽  
pp. 1536-1540 ◽  
Author(s):  
Xin Sheng Huang ◽  
Kazutaka Suzuki ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Magnesium Alloy ◽  
Rotation Speed ◽  
Rolling Direction ◽  
Rolling Temperature ◽  
Speed Ratio ◽  
Basal Texture ◽  
Homogeneous Microstructure ◽  
Texture Intensity ◽  
Differential Speed Rolling ◽  
Stretch Formability

The AZ61 magnesium alloy was subjected to the differential speed rolling at different rolling conditions including reduction per pass, rotation speed ratio and rolling temperature, and the influences of the rolling conditions on microstructure, texture, mechanical properties and formability of the as-rolled sheets were investigated. Increasing the reduction per pass results in a more homogeneous microstructure and a relatively weaker basal texture. With increasing the rotation speed ratio, the inclination angle of basal pole toward the rolling direction increases and the stretch formability enhances correspondingly. Increasing the rolling temperature has an effect on weakening the basal texture intensity and leads to the enhancement of stretch formability.

Improvement of formability of Mg–Al–Zn alloy sheet at low temperatures using differential speed rolling

2009 ◽  
Vol 470 (1-2) ◽  
pp. 263-268 ◽  
Author(s):  
Xinsheng Huang ◽  
Kazutaka Suzuki ◽  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Low Temperatures ◽  
Alloy Sheet ◽  
Differential Speed Rolling ◽  
Zn Alloy ◽  
Differential Speed
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