EFFECT OF TRACE ELEMENTS P AND Mn ON THE MICROSTRUCTURE AND HYDROGEN EMBRITTLEMENT OF AN Fe-Ni-Co BASED SUPERALLOY

Abstract

Abstract: In this paper,the microstructure and hydrogen embrittlement(HE) susceptibility of an Fe-Ni-Co based superalloy with different contents of trace elements,P and Mn,have been investigated.The results indicated that by lowering the contents of trace elements P and Mn,the size and distribution of γ' become more homogeneous,and the precipitation of stable phase η can be retarded to longer ageing time.As a result,the hydrogen resistant properties of the alloy are obviously improved.

Key words: microstructure, hydrogen embrittlement, P, Mn, Fe-Ni-Co based superalloy

WANG Anchuan;YANG Ke;FAN Cungan;LI Yiyi(Institute of Metal Research,Chinese Academy of Sciences Shenyang 110015,China) Manuscript received 4 May 1995. EFFECT OF TRACE ELEMENTS P AND Mn ON THE MICROSTRUCTURE AND HYDROGEN EMBRITTLEMENT OF AN Fe-Ni-Co BASED SUPERALLOY[J]. Acta Metallurgica Sinica (English Letters), 1996, 9(1): 32-36.

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EFFECT OF TRACE ELEMENTS P AND Mn ON THE MICROSTRUCTURE AND HYDROGEN EMBRITTLEMENT OF AN Fe-Ni-Co BASED SUPERALLOY

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