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首页> 外文期刊>Materials Science and Engineering >Powder metallurgical processing of a 2xxx series aluminum powder metallurgy metal alloy reinforced with AlN particulate additions
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Powder metallurgical processing of a 2xxx series aluminum powder metallurgy metal alloy reinforced with AlN particulate additions

机译：用AlN颗粒增强的2xxx系列铝粉末冶金金属合金的粉末冶金加工

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Two AlN powders were admixed with a commercially-relevant press-and-sinter aluminum alloy, differentiated by their mean particle sizes of 3.0 and 12 mu m. The effects on powder characteristics and mechanical properties were of primary interest and were compared to nonreinforced compacts. Ceramic additions affected the behavior of the alloy in the powdered, green and sintered state. AlN additions promoted gains in green strength but negatively affected sinterability in some instances although effects were marginal when coarse or fine AlN powder additions were limited to 5 vol% and 2 vol%, respectively. Decreased densities manifested as marginal decreases in yield strength, UTS and fatigue properties. For a fixed AlN concentration, alloys containing D-50 = 12 mu m or D-50 = 3 mu m AlN exhibited comparable mechanical properties. Above 5%, the coarser particulate maintained a higher sinterability and superior mechanical properties. Dynamic elastic modulus measurements of 73.0 and 74.3 GPa were measured for compacts with 2 and 5 vol% of coarse AlN particulate. AlN additions did not significantly influence the fatigue survival stress.
机译：将两种AlN粉末与与商业相关的压制和烧结铝合金混合，其平均粒径分别为3.0和12μm。对粉末特性和机械性能的影响是首要关注的问题，并已与非增强压块进行了比较。陶瓷添加剂影响了粉末，生坯和烧结状态下合金的性能。 AlN的添加促进了生坯强度的增加，但在某些情况下对可烧结性产生了负面影响，尽管当将AlN粗粉或细粉的添加量分别限制为5vol％和2vol％时，其影响微不足道。密度降低表现为屈服强度，UTS和疲劳性能略有下降。对于固定的AlN浓度，含有D-50 = 12μm或D-50 = 3μmAlN的合金表现出相当的机械性能。高于5％，较粗的颗粒保持较高的烧结性和优异的机械性能。对于含有2和5％（体积）的粗AlN颗粒的压块，动态弹性模量测量值为73.0和74.3 GPa。 AlN的添加不会显着影响疲劳生存应力。

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