Morphology of β-Al5FeSi phase in Al-Si cast alloys
Morphology of β-Al5FeSi phase in Al-Si cast alloys
复制标题
DOI：
10.2320/matertrans.47.1303
复制
发表时间：
2006-05-01
影响因子：
1.2
通讯作者：
Campbell, John
中科院分区：
文献类型：
--
作者：
Cao, Xinjin;Campbell, John
β-Al-5 FeSi片状结构一直被认为是脆性的，是铸造Al-Si合金力学性能差的原因。在β-Al 5 FeSi片晶中通常观察到两种典型的裂纹，横向和纵向。认为裂纹可能是由于双层氧化膜（bifilm）的存在，尽管一些横向裂纹可能是由于脆性。裂纹实际上是夹带氧化膜的两个干燥面之间的差距。其润湿面是β-Fe片晶成核和生长的有利基质。在折叠膜上形成β-Fe片晶的这一发现回答了许多以前难以解决的问题。在β-Fe相中遇到。对于未来，人们可以推测，如果氧化膜可以消除前铝熔体，它可能被证明是可能的，创造具有异常高的韧性合金。尽管Fe含量高。
The beta-Al-5 FeSi platelets have long been thought to be brittle and responsible for the inferior mechanical properties of Al-Si cast alloys. Two typical cracks, transverse and longitudinal, are commonly observed in beta-Al5FeSi platelets. It is thought that the cracks are probably due to the presence of doubled-over oxide films (bifilm) though some transverse cracks may be due to the brittleness. The crack is actually the gap between the two dry sides of an entrained oxide film. Its wetted sides are the favoured substrates for the nucleation and growth of beta-Fe platelets. This discovery of the formation of beta-Fe platelets on folded films has answered many previously intractable question., encountered in beta-Fe phase. For the future, one may speculate that if oxide films could be eliminated front Al melts, it may prove possible to create alloys with unusually high toughness. despite high Fe contents.