کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1640981 | 1517207 | 2016 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Intermetallics formed at interface of ultrafine grained Al/Mg bi-layered disks processed by high pressure torsion at room temperature Intermetallics formed at interface of ultrafine grained Al/Mg bi-layered disks processed by high pressure torsion at room temperature](/preview/png/1640981.png)
• A Mg/Al bilayered disk is bonded by high pressure torsion at room temperature.
• A very thin layer of γ-Mg17Al12 of 260 nm in thickness is formed at the interface.
• Forming γ phase at low temperature is due to high pressure and large strain, etc.
• No other phases were detected, which is attributed to high interfacial energies
In this work, Mg/Al bi-layered disks were fabricated by high pressure torsion (HPT) at room temperature. A 0.26 µm layer of γ-Mg17Al12 intermetallic formed at the interface of Mg/Al disks. This is very different to the interface of Mg/Al produced by other techniques such as diffusion bonding and friction stir welding where both γ-Mg17Al12 and β-Al3Mg2 form and the β-Al3Mg2 layer is much thicker than the γ-Mg17Al12 layer. This unusual phenomenon is attributed to the interfacial energies of intermetallics and the effect of room temperature HPT on diffusion of Al in Mg and the γ-Mg17Al12 layer.
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Journal: Materials Letters - Volume 181, 15 October 2016, Pages 187–190