CREEP BEHAVIORS OF Mg MICROALLOYED WROUGHT SUPERALLOYS

Acta Metall Sin

1989, Vol. 25

Issue (6): 65-69 DOI:

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CREEP BEHAVIORS OF Mg MICROALLOYED WROUGHT SUPERALLOYS

MA Peili;YUAN Ying;ZHONG Zengyong Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing MA Peili; Lab; of Superalloy; Central Iron and Steel Research Institute;Ministry of Metallurgical Industry; Beijing 100081

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Abstract By adding small amount of Mg to the wrought superalloys, their steadystage of creep, and especially the tertiary stage of creep are prolonged, and thesteady creep rate is decreased in the cases of low strain rates. At higher strain ra-tes, however, the effect of Mg on creep rate has been found to be vanish. Thesemay be attributed to the Mg dissolution in the matrix. A mechanism of the effectof Mg addition on creep behavior is proposed.

Key words: Mg microalloying creep wrought superalloy activation energy of vacancy

Received: 18 June 1989

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