The identification of a silicide phase and its crystallographic orientation to ferrite within a complex stainless steel

JOURNAL OF NUCLEAR MATERIALS

卷:517

Article

Bowden, D.¹  Stewart, D.²  Preuss, M.¹ 

[1] Univ Manchester, Sch Mat, Oxford Rd, Manchester M13 9PL, Lancs, England

[2] Rolls Royce PLC, Derby DE24 8BJ, Derby, England

关键词: Steels;    Electron backscattering diffraction (EBSD);    Silicides;    Texture;   

DOI  :  10.1016/j.jnucmat.2019.02.028

来源: Elsevier

【 摘 要 】

Recently, a high-hardness intermetallic phase, named pi-ferrosilicide, has been identified within a stainless steel alloy intended to replace Co-based hardfacings within pressurised water reactors. The present study explores the evolution and relationship of the pi-ferrosilicide and ferrite phases after a hot isostatic pressing cycle, compared to a cast pi-ferrosilicide microstructure. Electron backscatter diffraction is used to identify two orientation relationships between the pi-ferrosilicide and ferrite phases. Due to variant selection and growth of the interdendritic pi-ferrosilicide within the gas-atomised hardfacing alloy powder, a microtexture develops within this phase with potential implications for the mechanical properties of the alloy. (C) 2019 Elsevier B.V. All rights reserved.

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