Abstract
Investigations were carried out on aging of a HSLA-100 steel containing Cu as the major alloying element and Nb, Ti and V as microalloying elements. The aging process after varying amounts of cold deformation was followed by hardness measurements and microstructural changes were studied using light and electron microscopy. Presence of Ti activates the formation of (Nb, Ti)C precipitates and completely suppresses the precipitation of Cu. Even a solution treatment at 1100°C is not sufficient to completely dissolve Nb and Ti in the matrix and undissolved (Nb, Ti)C precipitates were observed in oil quenched state. Strain induced aging at 400° C causes simultaneous coarsening of existing precipitates and nucleation of fresh carbides, which results in multi-stage hardening in this steel. Strong precipitate-dislocation interactions cause retardation in recrystallization of deformation structure leading to retention of high hardness levels even on prolonged aging
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bhagat A N, Pabi S K, Ranganathan S and Mohanty O N 2004ISIJ Int. 44 115
Cutler L R 1979 inCopper in iron and steel (eds) L McDonald Schetky and I LeMay (New York: John-Wiley & Sons) p. 26
Dhua S K, Mukerjee D and Sarma D S 2001aMetall. Mater. Trans. A32 2259
Dhua S K, Ray A and Sarma D S 2001bMater. Sci. Eng. A318 197
Dhua S K, Mukerjee D and Sarma D S 2003Metall. Mater. Trans. A34 241
Dutta B and Sellars C M 1987Mater. Sci. Technol. 3 197
Dutta B, Valdes E and Sellars C M 1992Acta Mater. 40 653
Dutta B, Palmiere E J and Sellars C M 2001Acta Mater. 49 785
Ghosh A, Das S, Chatterjee S, Mishra B and Ramachandra Rao P 2003Mater. Sci. Eng. A348 299
Ghosh A, Mishra B, Das S and Chatterjee S 2004Mater. Sci. Eng. A374 43
Ghosh A, Mishra B, Das S and Chatterjee S 2005Mater. Sci. Eng. A396 320
Gomez M, Medina S F, Quispe A and Valles P 2002ISIJ Int. 42 423
Hong S G, Kang K B and Park C G 2002Scr. Mater. 46 163
Hong S C, Lim S H, Hong H S, Lee K J, Shin D H and Lee K S 2003aMater. Sci. Eng. A355 241
Hong S G, Jun H J, Kang K B and Park C G 2003bScr. Mater. 48 1201
Kajalainen L P, Maccagno T and Jonas J J 1995ISIJ Int. 35 1523
Krishnadev M R and Cutler L R 1979 inCopper in iron and steel (eds) L McDonald Schetky and I LeMay (New York: John-Wiley & Sons) p. 26
Li G, Maccagno T, Bai D Q and Jonas J J 1996ISIJ Int. 36 1479
Liu W J 1995Metall. Mater. Trans. A26 1641
Mao W, Ren H and Yu Y 2004Z. Metallkd. 95 57
Medina S F 1995Scr. Mater. 32 43
Medina S F, Quispe A, Valles P and Banos J L 1999ISIJ Int. 39 913
Palmiere E J, Garcia C I and DeArdo A J 1994Metall. Mater. Trans. A25 277
Panwar S, Goel D B, Pandey O P and Prasad K S 2003Bull. Mater. Sci. 26 441
Panwar S, Goel D B and Pandey O P 2005Bull. Mater. Sci. 28 259
Sellars C M 1990Mater. Sci. Technol. 6 1072
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Panwar, S., Goel, D.B., Pandey, O.P. et al. Effect of microalloying on aging of a Cu-bearing HSLA-100 (GPT) steel. Bull Mater Sci 29, 281–292 (2006). https://doi.org/10.1007/BF02706498
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02706498