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Investigation of Al-Fe-Si Alloys with Additions of Hf, Sc and Zr

机译:含Hf,Sc和Zr的Al-Fe-Si合金的研究

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摘要

To meet the demand for extruded aluminium alloys tolerant of exposures to highrntemperatures (~600℃), highly stable microstructures are required. In order to achievernthis, Hf, Sc and Zr were added to Al-Fe-Si alloys. These elements form dispersoids of therntype Al3X (X=Hf,Sc,Zr) in aluminium alloys, and Transmission Electron Microscopy (TEM)rnhas been applied in order to gain more information about the formation of these phases.rnThe recrystallisation resistance during extrusion and subsequent annealing was alsorninvestigated. Al-Fe-Si with Hf, Sc and Zr displayed a remarkable recrystallisationrnresistance as only a thin surface layer recrystallised during post-extrusion annealing atrn600℃. The variant containing only Hf was far less resistant towards recrystallisation as itrnrecrystallised completely already during extrusion.
机译:为了满足挤压铝合金耐高温(〜600℃)的要求,需要高度稳定的显微组织。为了达到这个目的,将Hf,Sc和Zr添加到Al-Fe-Si合金中。这些元素在铝合金中形成Thertype Al3X(X = Hf,Sc,Zr)的弥散体,并应用了透射电子显微镜(TEM)以获得有关这些相形成的更多信息.rn挤压和随后的抗再结晶性还对退火进行了研究。含Hf,Sc和Zr的Al-Fe-Si表现出显着的再结晶电阻,因为在600℃的挤压后退火过程中,只有一个薄的表面层会再结晶。仅含有Hf的变体对再结晶的抵抗力要低得多,因为它在挤压过程中已经完全再结晶。

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