Si对快速凝固/粉末冶金(RS/PM)AZ91镁合金组织和性能的影响

随着经济发展和社会进步，人们在消费行为过程中除了考虑自身的经济利益外，也越来越多地受到社会规范的约束。传统的经济行为模型以经济理性作为主要甚至是唯一的驱动因素来解释人的行为，越来越面临严重的挑战。基于社会规范对于人们行为的支配性影响，我们提出了规范理性的概念，认为消费者在进行消费决策时，不仅受经济理性的影响，还受到规范理性的影响，规范理性和经济理性共同构成影响消费行为的基本驱动力。

Effect of Si Content on Microstructure and Property of Rapid Solidification/Powder Metallurgy (RS/PM) AZ91 Alloy

Si-enhanced AZ91 magnesium alloy was obtained through Rapid Solidification/Powder Metallurgy (RS/PM). The effects of different Si content on the microstructure, the room and elevated temperature mechanical properties of AZ91 alloy were examined. The results show that Mg2Si particles generated in situ grew up gradually as the increasing of Si content. Adding Si to the alloy can significantly improve the room and elevated temperature mechanical properties. At the room temperature, the tensile strength of alloys improved with the Si contents increased when the Si contents less than 3(mass)%. But when the Si contents increased to 5(mass)%, the alloy tensile strength reduced significantly. The alloy with 3(mass)%Si exhibits the best mechanical properties, its 0.2% yield tensile strength, ultimate tensile strength and elongation of rupture were 354.93 MPa, 472.36 MPa and 4.70%,respectively. And the alloy elevated temperature (473 K) tensile properties improved as the Si addition increased.