Increasing the strength of nanocrystalline steels by annealing: Is segregation necessary?

SCRIPTA MATERIALIA

卷:95

Article

Renk, O.¹  Hohenwarter, A.²  Eder, K.³  Kormout, K. S.¹  Cairney, J. M.³  Pippan, R.¹ 

[1] Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

[2] Univ Leoben, Dept Phys Mat, A-8700 Leoben, Austria

[3] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

关键词: Nanocrystalline 316L;    Hardening;    Annealing;    Segregation;    Atom probe tomography;   

DOI  :  10.1016/j.scriptamat.2014.09.023

来源: Elsevier

【 摘 要 】

Hardening phenomena in nanocrystalline metals after annealing have been widely reported, and the subject of much recent debate. Solute segregation to grain boundaries and dislocation source hardening have been proposed to cause the strengthening. To shed light on the dominant mechanisms, we present results from mechanical experiments and atom probe tomography on samples with similar grain size but different amounts of solute segregation and different boundary chemistries. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

Free