【摘要】 铝/镁合金压铸件广泛应用于汽车工业。微观组织对铸件的力学性能有着决定性的影响，而微观组织特征对于研究微观结构与力学性能之间的关系至关重要。在过去十年间，人们利用X射线断层扫描技术（μ-CT）对压铸铝/镁合金的微观组织特征，尤其是微观孔洞和富Fe金属间化合物，展开了三维研究。本文回顾了压铸铝/镁合金微观组织三维断层扫描研究进展与现状，重点包括：微观孔洞、富Fe金属间化合物等三维特征及其分布；微观组织对合金力学性能的影响与定量关系；展望了基于实际三维特征的压铸铝/镁合金组织形成机制和组织与性能关系的研究。更多还原

【Abstract】 Al and Mg alloy high pressure die castings(HPDC) are increasingly used in automotive industries. The microstructures in the castings have decisive effect on the casting mechanical properties, in which the microstructure characteristics are fundamental for investigation of the microstructure-property relation. During the past decade, the microstructure characteristics of HPDC Al and Mg alloys, especially micro-pores and α-Fe, have been investigated from two-dimensional(2D) to three-dimensional with X-rays micro-computed tomography(μ-CT). This paper presents the current understanding of 3D characteristics and formation mechanism, spatial distributions, and effect on mechanical properties of the microstructures in high-pressure die cast(HPDC) alloys. Additionally, it outlines future research directions for the formation and control of heterogeneous microstructures in HPDC alloys.更多还原