CREEP PROPERTIES OF HIGH SILICON ALLOY ZA27 PREPARED BY SPRAY DEPOSITION

Abstract

Abstract: The elevated temperature creep properties(90-150℃) of high silicon(～6wt%Si) alloy ZA27 prepared by spray deposition have been investigated by means of ball hardness testing method.The results indicate that the creep properties of the material prepared by spray deposition are notably improved,compared to that of the conventional casting alloy ZA27.The creep activation energy of the spray deposited alloy ZA27 is 3.9-5.7 kJ/mol higher than that of the conventional casting alloy ZA27.The creep formulation in this experiment is also derived as follows:HB-2-HB0-2=K exp(- Q/3RT)(t1/3-t01/3)The reasons for the improvement of creep resistance are also discussed from a microstructural point of view.

Key words: spray deposition, zinc-based alloy, creep, microstructure

YANG Liushuan;LIU Yongchang;YANG Gencang;ZHOU Yaohe(State Key Laboratory of Solidification Processing,Northwestern Polytechnic University,Xi'an,710072,China). CREEP PROPERTIES OF HIGH SILICON ALLOY ZA27 PREPARED BY SPRAY DEPOSITION[J]. Acta Metallurgica Sinica (English Letters), 1996, 9(2): 140-146.

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CREEP PROPERTIES OF HIGH SILICON ALLOY ZA27 PREPARED BY SPRAY DEPOSITION

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