Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel

Z. W. Zhang; C. T. Liu; Y. R. Wen; A. Hirata; S. Guo; G. Chen; M. W. Chen; Bryan A. Chin

doi:10.1007/s11661-011-0835-4

Author(s)

Z. W. Zhang
Y. R. Wen
A. Hirata
S. Guo
G. Chen
M. W. Chen
Bryan A. Chin

Detail(s)

Original language	English
Pages (from-to)	351-359
Journal / Publication	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	43
Issue number	1
Publication status	Published - Jan 2012

Link(s)

DOI	DOI https://doi.org/10.1007/s11661-011-0835-4 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84855768972&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(19b0a541-0d2d-4545-b38a-2c0bd3383f33).html

Abstract

This study investigated the effect of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel, Fe-1.5Mn-2.5Cu-4.0Ni-1.0Al (wt pct). The effect of thermomechanical treatments on the microhardness and tensile properties were measured at room temperature and correlated with microstructural features. Cu-rich precipitates were characterized by transmission electron microscopy and were found to coarsen slowly during long-time aging. The microhardness measurements indicate a typical precipitation hardening behavior during aging at 773 K (500 °C). Tensile tests showed that thermomechanical treatments can improve the mechanical strength and ductility of the nanocluster-strengthened ferritic steel significantly compared with those without the treatments. Fractography results indicated that the high yield strength resulted from precipitation hardening makes the steel more susceptible to grain-boundary decohesion, which can be suppressed by grain refinement. Atmosphere adsorption and diffusion along grain boundaries were found to intensify brittle intergranular fracture, and this embrittlement can be avoided by vacuum heat treatment. © 2011 The Minerals, Metals & Materials Society and ASM International.

Citation Format(s)

[ RIS ] [ BibTeX ]

Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel. / Zhang, Z. W.; Liu, C. T.; Wen, Y. R. et al.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 43, No. 1, 01.2012, p. 351-359.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Zhang, ZW, Liu, CT, Wen, YR, Hirata, A, Guo, S, Chen, G, Chen, MW & Chin, BA 2012, 'Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel', Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 43, no. 1, pp. 351-359. https://doi.org/10.1007/s11661-011-0835-4

Zhang, Z. W., Liu, C. T., Wen, Y. R., Hirata, A., Guo, S., Chen, G., Chen, M. W., & Chin, B. A. (2012). Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 43(1), 351-359. https://doi.org/10.1007/s11661-011-0835-4

Zhang ZW, Liu CT, Wen YR, Hirata A, Guo S, Chen G et al. Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2012 Jan;43(1):351-359. doi: 10.1007/s11661-011-0835-4

Zhang, Z. W. ; Liu, C. T. ; Wen, Y. R. et al. / Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2012 ; Vol. 43, No. 1. pp. 351-359.