Abstract
Influence of prior-γ grain boundary segregation of alloy elements on intergranular fracture stress is important for the mechanism of temper embrittlement. There are a few efforts based on pure-iron [1], but no report on low carbon martensitic steels. In this study, the effect of segregation of phosphorus (P), manganese (Mn) and molybdenum (Mo) was investigated. The samples were melted by changing the amount of P, Mn and Mo based on the base Fe-0.1%C-3%Mn-90 ppmP. The martensitic steels with coarse prior-gamma (γ) were made by quenching and tempering. The segregation was measured by Auger electron spectroscopy, and the intergranular fracture stress was regarded as the yield strength at ductile brittle transition temperature of Charpy V-notch test. This study revealed that the segregation of P weakened the fracture stress mostly in the order of P and Mn, and that of Mo strengthened the fracture stress quantitatively. Mn-P co-segregation was not observed. The segregation of P was decreased by the addition of Mo.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Lee DY, Barrera EV, Stark JP, Marcus HL (1984) Metall Trans A 15:1415
Mulford RA, McMahon CJ Jr, Pope DP, Feng HC (1976) Metall Trans A 7:1183
McMahon CJ Jr (1989) Mater Sci Forum 46:61
Yu J, McMahon CJ Jr (1980) Metall Trans 11A:277
Yu J, McMahon CJ Jr (1980) Metall Trans 11A:291
Petch NJ (1986) Acta Metall 34:1387
Geng WT, Freeman AJ, Olson GB (2001) Phys Rev B 63:165415
Yamaguchi M (2011) Metall Trans A 42:319
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Yoshimura, M., Hoshino, M., Minagawa, M., Fujioka, M. (2018). The Effects of Prior-γ Grain Boundary Segregation of Phosphorus, Manganese and Molybdenum on Intergranular Fracture Stress in Low Carbon Martensite Steels. In: Stebner, A., Olson, G. (eds) Proceedings of the International Conference on Martensitic Transformations: Chicago. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-76968-4_3
Download citation
DOI: https://doi.org/10.1007/978-3-319-76968-4_3
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-76967-7
Online ISBN: 978-3-319-76968-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)