Effect of intermediate heat treatment on microstructure and texture evolution of continuous cast Al-Mn-Mg alloy sheet

Evolution of crystallographic texture by hot rolling deformation at the temperature of 200°C was investigated by hot rolling tests on as-cast Al-5wt%Mg alloy fabricated by a new strip cast technology. Texture variation through the thickness direction in the Al-5wt%Mg alloy was examined experimentally. Macrotexture and microtexture measurements were conducted using X-ray diffractometer and electron backscatter diffraction (EBSD), respectively. Experimental investigation reveals that the evolution of texture and microstructure is strongly dependent on a distance from center of the Al-5wt%Mg alloy sheet. It was found that the shear texture components tend to be increased at the surface region of the hot-rolled specimen.

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A Study of P Orientation {011}〈566〉 in a Continuous Cast Al-Mn-Mg Alloy with Pre-Heat Treatment

10.4271/2008-01-1097 ◽

2008 ◽

Author(s):

Qiang Zeng ◽

Jianhui Xu ◽

Xiuping Jiang ◽

Tony Zhai ◽

Xiyu Wen

Keyword(s):

Heat Treatment ◽

Mg Alloy ◽

Continuous Cast

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Microstructure and Texture Evolution during Friction Stir Processing of AZ31 Mg Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.1195 ◽

2010 ◽

Vol 654-656 ◽

pp. 1195-1200 ◽

Cited By ~ 23

Author(s):

Ren Long Xin ◽

Bo Li ◽

Qing Liu

Keyword(s):

Grain Size ◽

Texture Evolution ◽

Base Material ◽

Alloy Sheet ◽

Electron Back Scatter Diffraction ◽

Mg Alloy ◽

Gradual Change ◽

Friction Stir ◽

Az31 Mg Alloy ◽

Average Grain Size

In this study, a well-textured AZ31 Mg alloy sheet was friction stir (FS) processed, and the microstructure and texture evolution in various regions of the processed alloy were examined by optical microscopy (OM) and electron back scatter diffraction (EBSD). The results showed that the grain size in the FS zone was significantly refined compared to that in the base material (BM). The average grain size in the thermomechanically affected zone (TMAZ) and heat-affected zone (HAZ) was comparable with that in the BM. There is a gradual change of local texture from BM to FS zone due to plastic flow together with heating input during the FS processing. The <0002> direction was roughly parallel to the cylindrical pin surface normal of the FS zone. The <0002> direction in the HAZ is similar to that in the BM, but more diffuse. The <0002> direction in the TMAZ was tilted 25~30o away from the ND and there is a distinct boundary between the FS zone and TMAZ at the advancing side which introduced an incompatibility between the FS zone and TMAZ. This might explain the fact that the transverse FS processed Mg alloys commonly fracture at the advancing side during tensile tests.

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Assessing the Effect of Altering Secondary Phase in Friction Stir Processed AZ91 Mg Alloy by Solution Heat Treatment

SSRN Electronic Journal ◽

10.2139/ssrn.3654040 ◽

2020 ◽

Author(s):

Hemendra Patle ◽

Venkateswarlu Badisha ◽

Yogeshwar Chakrapani Venkatesan ◽

Siva Irullappasamy ◽

Ratna Sunil B ◽

...

Keyword(s):

Heat Treatment ◽

Solution Heat Treatment ◽

Secondary Phase ◽

Mg Alloy ◽

Friction Stir

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Effect of post-heat treatment on microstructure and mechanical properties of laser welded Al-Cu-Mg alloy

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2021.02.008 ◽

2021 ◽

Vol 64 ◽

pp. 620-632

Author(s):

Alexander Malikov ◽

Anatoly Orishich ◽

Igor Vitoshkin ◽

Evgeniy Karpov ◽

Alexei Ancharov

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Mg Alloy ◽

Post Heat Treatment ◽

Microstructure And Mechanical Properties

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Heat Treatment-Induced Microstructure and Property Evolution of Mg/Al Intermetallic Compound Coatings Prepared by Al Electrodeposition on Mg Alloy from Molten Salt Electrolytes

Materials ◽

10.3390/ma14061407 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1407

Author(s):

Tianyu Yao ◽

Kui Wang ◽

Haiyan Yang ◽

Haiyan Jiang ◽

Jie Wei ◽

...

Keyword(s):

Heat Treatment ◽

Intermetallic Compound ◽

Intermetallic Compounds ◽

Mg Alloy ◽

X Ray Diffraction ◽

Electron Backscattered Diffraction ◽

Alloy Matrix ◽

Comprehensive Properties ◽

Compound Coatings ◽

Compound Coating

A method of forming an Mg/Al intermetallic compound coating enriched with Mg17Al12 and Mg2Al3 was developed by heat treatment of electrodeposition Al coatings on Mg alloy at 350 °C. The composition of the Mg/Al intermetallic compounds could be tuned by changing the thickness of the Zn immersion layer. The morphology and composition of the Mg/Al intermetallic compound coatings were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron backscattered diffraction (EBSD). Nanomechanical properties were investigated via nano-hardness (nHV) and the elastic modulus (EIT), and the corrosion behavior was studied through hydrogen evolution and potentiodynamic (PD) polarization. The compact and uniform Al coating was electrodeposited on the Zn-immersed AZ91D substrate. After heat treatment, Mg2Al3 and Mg17Al12 phases formed, and as the thickness of the Zn layer increased from 0.2 to 1.8 μm, the ratio of Mg2Al3 and Mg17Al12 varied from 1:1 to 4:1. The nano-hardness increased to 2.4 ± 0.5 GPa and further improved to 3.5 ± 0.1 GPa. The Mg/Al intermetallic compound coating exhibited excellent corrosion resistance and had a prominent effect on the protection of the Mg alloy matrix. The control over the ratio of intermetallic compounds by varying the thickness of the Zn immersion layer can be an effective approach to achieve the optimal comprehensive performance. As the Zn immersion time was 4 min, the obtained intermetallic compounds had relatively excellent comprehensive properties.

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