Enhanced mechanical properties of additive manufactured Grade 91 steel

SCRIPTA MATERIALIA

卷:199

Article

El-Atwani, O.¹  Eftink, B. P.¹  Cady, C. M.¹  Coughlin, D. R.²  Schneider, M. M.¹  Maloy, S. A.¹ 

[1] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Sigma Div, Los Alamos, NM USA

关键词: Additive manufacturing;    Grade 91 steel;    Creep;    Stress-strain;    Grain boundaries;    Thermal stability;   

DOI  :  10.1016/j.scriptamat.2021.113888

来源: Elsevier

【 摘 要 】

High temperature stability of the mechanical properties, including creep behavior, are important factors to consider in certifying additive manufactured (AM) steels for reactor operation. AM-Grade 91 steel, tested at RT is shown to possess high yield strength, strain hardening and ductility even after high temperature aging for extended hours. Enhanced creep resistance at 650 degrees C is also evident in the AM Grade 91 steel compared to wrought Grade 91 steel tested at the same conditions. The diverse and complex microstructure of this AM steel allows for both enhanced strength and ductility but increases the ductile-to-brittle transition temperature in these steels. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

Free