Creep Induced Phase Transformation in Extruded Zn-Al Alloy

J. Mater. Sci. Technol. ›› 1997, Vol. 13 ›› Issue (6): 503-507.

Creep Induced Phase Transformation in Extruded Zn-Al Alloy

收稿日期:1997-11-28 修回日期:1997-11-28 出版日期:1997-11-28 发布日期:2009-10-10

Creep Induced Phase Transformation in Extruded Zn-Al Alloy

Received:1997-11-28 Revised:1997-11-28 Online:1997-11-28 Published:2009-10-10

摘要/Abstract

摘要： 1-IntroductionAnewfamilyofhigherAlcontainingZn-Albasedalloys,ZA-8,ZA-12andZA-27,waSdevelopedandappliedextensivelyforproductionofpressurediecastandbearingcon1ponentssincel97Oinordertoimprovethemechanicalpropertiesandthewearresistancel1].WithadditionofCuupto3wtpct,thetraditiollalsuperp1asticeutectoidZn-Alalloyim-provedgreatlyintensilestrengthandcreepresistance,andbecameattractivebecauseofitscom....

Abstract: Phase transformation and microstructural change of an extruded eutectoid Zn-Al alloy Zn76Al22Cu2 (wt pct) were investigated during creep testing by using SEM and X-ray diffraction techniques. Creep induced decomposition of a metastable η'T phase and a four phase transformation, α+ ε →T' +η, occurred during the creep testing. Also a microstructural change was observed from a lamellar structure into a spheroidized structure in the rupture part of the extruded alloy. It provided evidence of creep induced phase transformations which occurred in ageing process. The mechanism of creep rupture of the extruded Zn-Al alloy was also discussed.

Y.H.ZHU and J.Juarez Islas(Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Apartado P.70-360,Mexico D.F.04510, Mexico)E. Orozco(Instituto de Fisica, Universidad Autonoma de Mexico, Apartado P.20-364, Mexico D.F.04510, . Creep Induced Phase Transformation in Extruded Zn-Al Alloy[J]. J. Mater. Sci. Technol., 1997, 13(6): 503-507.

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Creep Induced Phase Transformation in Extruded Zn-Al Alloy

Creep Induced Phase Transformation in Extruded Zn-Al Alloy

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