噴射沉積Al-Si-Fe-Mn-Cu-Mg合金的析出強化行為

Precipitation Behavior of the Spray-deposited Al-Si-Fe-Mn-Cu-Mg Alloy

摘要: 利用熱分析(DSC)、顯微硬度測定和透射電子顯微分析等手段研究了噴射沉積Al-20Si-5Fe-3Mn-3Cu-1Mg合金的時效過程.結果表明,兩種沉淀強化相S-Al₂CuMg和σ-Al₅Cu₆Mg₂從合金基體中析出,它們有效地提高了合金的室溫強度和高溫(300℃)強度.

Abstract: The aging process of the spray-deposited Al-20Si-5Fe-3Mn-3Cu-1Mg alloy was investigated by DSC analysis, microhardness measurement, TEM and HREM observations. The results show that two kinds of precipitates, S-Al₂CuMg and σ-Al₅Cu₆Mg₂ precipitate from matrix and improve the tensile strength of the alloy efficiently at both the ambient and elevated temperatures (300℃).