Effect of milling and reinforcement on mechanical properties of nanostructured magnesium composite
Effect of milling and reinforcement on mechanical properties of nanostructured magnesium composite
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DOI：
10.1016/j.jmatprotec.2008.10.044
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发表时间：
2009-05
影响因子：
6.3
通讯作者：
M. Thein;Ling Lu;M. Lai
中科院分区：
文献类型：
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作者：
M. Thein;Ling Lu;M. Lai
利用回收的镁片，用xwt% （x=1、2和5）原位成形AlN粉末增强Mg - 5wt%Al纳米结构Mg复合材料。采用机械铣削法制备晶粒尺寸为30 ~ 43nm的复合粉体。将机械磨粉（MMed）粉末进行单轴挤压、烧结和热挤压等工艺制备成块状固体样品。经过400℃烧结和350℃热挤压后，复合材料样品的晶粒尺寸仍保持在52 ~ 84nm的纳米范围内。讨论了铣削工艺和AlN添加量对材料抗拉强度和塑性等力学性能的影响，并对其变形机理进行了一般解释。
Recycled Mg chips were used to synthesize nanostructured Mg composite of Mg–5wt%Al reinforced with xwt% (x=1, 2 and 5) in-situ formed AlN powder. Mechanical milling was employed to produce the composite powder of crystalline size 30–43nm. The mechanically milled (MMed) powders were subjected to uniaxial pressing, sintering and hot extrusion processes to produce bulk solid samples. After sintering at 400°C and hot extrusion at 350°C, the crystalline size of the composite samples still remains in nanometer range from 52 to 84nm. The effect of milling and the percentage of reinforced AlN on the mechanical properties such as tensile strength and ductility were discussed with the general explanation of deformation mechanisms involved.