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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.1; Jul 7-11, 2003; Leganes, Madrid, Spain >Mechanical Alloying of Powder Mixture of Magnesium Alloy Chips and Aluminum
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Mechanical Alloying of Powder Mixture of Magnesium Alloy Chips and Aluminum

机译：机械合金化镁合金切屑与铝的粉末混合物

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摘要

To produce magnesium alloy with ultra fine-grain size, an aluminum powder was mixed to turning chips of AZ31 alloy with various contents, and then they were mechanically alloyed for various milling times. Microstructural changes of the mechanically alloyed powder with milling were investigated. Super-saturated solid solutions of the magnesium phase are formed in the Mg-12mol%Al, its crystalline size has a nanometer scale. The solid solutions are formed the eutectic structure together with Mg_(17)Al_(12) in the 30mol%Al powder mixtures mechanically alloyed for long milling time. In the case of the Mg-40mol%Al and 61.5mol%Al powders, the formation of the intermetallic compounds yields by the mechanical alloying for shorter milling time, and these crystals become to amorphous phase after the prolonged milling time. The harness of particles in the mechanically alloyed powder increases with forming of the super saturated solid solution or the intermetallic compound and their refining. The mechanically alloyed powder was extruded at various temperatures, and then mechanical properties of the alloy were investigated. Hardness and bending strength of the extruded alloy are higher than conventional cast alloy.
机译：为了生产具有超细晶粒尺寸的镁合金，将铝粉混合到各种含量的AZ31合金车削切屑中，然后将它们机械合金化各种铣削时间。研究了机械合金化粉末在研磨过程中的显微组织变化。镁相的超饱和固溶体在Mg-12mol％Al中形成，其晶体尺寸为纳米级。固溶体与Mg_（17）Al_（12）一起在30mol％Al粉末混合物中形成了共晶结构，经过机械合金化处理了很长时间。在使用Mg-40mol％Al和61.5mol％Al粉末的情况下，通过机械合金化可以缩短研磨时间，从而形成金属间化合物，经过延长的研磨时间，这些晶体变成非晶相。随着超饱和固溶体或金属间化合物的形成及其精制，机械合金化粉末中颗粒的线束增加。将机械合金化的粉末在不同温度下挤出，然后研究合金的机械性能。挤压合金的硬度和弯曲强度高于常规铸造合金。

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