Determination of carbon distributions in quenched and partitioned microstructures using nanoscale secondary ion mass spectroscopy

SCRIPTA MATERIALIA

卷:104

Article

Choi, Kyoo Sil¹  Zhu, Zihua¹  Sun, Xin¹  De Moor, Emmanuel²  Taylor, Mark D.²  Speer, John G.²  Matlock, David K.² 

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

[2] Colorado Sch Mines, Adv Steel Proc & Prod Res Ctr ASPPRC, Golden, CO 80401 USA

关键词: Nano-SIMS;    EBSD;    Carbon partitioning kinetics;    Quenching and partitioning;   

DOI  :  10.1016/j.scriptamat.2015.03.027

来源: Elsevier

【 摘 要 】

A multi-modal characterization technique, which combines nanoscale secondary ion mass spectroscopy (Nano-SIMS) with a spatial resolution of similar to 100 nm and electron back scatter diffraction (EBSD) to determine carbon distributions in austenite and martensite in a quenched and partitioned (Q&P) Fe-0.29C-2.95Mn-1.59Si steel is presented. Significant carbon enrichment of austenite was measured with decreased levels of carbon in martensite, supporting the carbon partitioning mechanism. Fresh untempered martensite could be identified, and different degrees of enrichment were observed for blocky and lath austenite. (C) 2015 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

【 授权许可】

Free