A Study on the Precipitates in Rapidly Quenched Al-Ti-Zr Alloys

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Title:	A Study on the Precipitates in Rapidly Quenched Al-Ti-Zr Alloys Al-Ti-Zr速凝合金之析出相研究
Authors:	曹春暉
Contributors:	華岡工程學報
Keywords:	aluminum alloys rapid solidification precipitation coarsening rate hardness testing
Date:	2001-06
Issue Date:	2014-11-03 10:19:40 (UTC+8)
Abstract:	本實驗以兩種成分之Al-Ti-Zr合金在425℃進行時效處理，研究基地內部析出相的成長及穩定性。結果顯示增加Zr含量曾加快析出物的成長速率，而Ll2結構Al3(Ti0.25Zr0.75)及Al3(Ti0.75Zr0.25)析出物的成長速率分別爲3.94×10^(-28)立方公尺/hr及1.61×10^(-28)立方公尺/hr。尖峰時效出現在425℃時效處理100小時，而Al-0.65Ti-3.22Zr及Al-1.74Ti1.14Zr合金的尖峰時效硬度分別爲HV75及HV78。 Two kinds of Al-Ti-Zr alloys were prepared to investigate the coarsening of the spherical L12-structured Al3(Ti, Zr) precipitates aging at 425℃for various periods of time. The results indicated that the increasing of Zr-content would result in increasing the coarsening rate of the precipitates. The coarsening coefficients of Ll2 structured Al3(Ti0.25Zr0.75) and A13(Ti0.75Zr0.25) precipitates in these Al-5vol.%Al3(Ti. Zr) alloys are 3.94×10^(-28) and 1.61×10^(-28) m^3/hr, respectively. The hardness data shows that the peakaging of both two alloys were aging at 425℃ for 100 hours, and the peakaging hardness of Al-0.65Ti-3.22Zr and Al-1.74Ti-1.14Zr alloys were HV 75 and HV 78, respectively.
Relation:	華岡工程學報； 15 期 (2001 / 06 / 01) ， P65 - 73
Appears in Collections:	[College of Engineering] Chinese Culture University Hwa Kang Journal of Engineering

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