Effect of co-addition of phosphorus and titanium on point defect behavior and precipitation in austenitic stainless steel under electron irradiation

Hideo Watanabe, Akinobu Aoki, Takeo Muroga, Naoaki Yoshida

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Microstructural evolution and radiation induced segregation under electron irradiation have been observed with a HVEM in pure Fe-16Cr-17Ni-0.1P-(0.1 approximately 0.25) Ti alloys. It was shown that P atoms served as the nuclei for interstitial loops in the alloy containing both P and Ti as well as the alloy containing P only. In the alloys containing both P and Ti, vacancy loop formation was prominent even at higher temperatures compared with alloys containing P only. These phenomena resulted in a remarkable suppression of void swelling and radiation-induced Ni depletion in matrices. The swelling suppression seemed to be related with the P concentration in matrices. Because of the strong interaction between P and Ti, P segregation to the defect sinks (grain boundary, dislocation and free surface) was retarded maintaining the P effect to suppress swelling in the matrix. The formation of M2P-type phosphides which act as defect sinks at higher temperatures was enhanced by Ti addition. These results suggest that the co-addition of P and Ti is very effective for increasing swelling resistance.

元の言語英語
ページ(範囲)981-990
ページ数10
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
53
発行部数10
DOI
出版物ステータス出版済み - 1 1 1989

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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