Bulletin of Materials Science

, Volume 26, Issue 4, pp 441–447 | Cite as

Aging of a copper bearing HSLA-100 steel

  • Sanjay Panwar
  • D B Goel
  • O P Pandey
  • K Satya Prasad
Article

Abstract

Investigations were carried out on aging of a HSLA-100 steel after varying amounts of cold deformation. Mechanical properties (hardness, tensile properties and toughness) were measured and structural changes were studied using optical, TEM and SEM techniques. As a result of various treatments, the hardness and UTS could be significantly improved, but with drastic fall in ductility and impact strength, especially in peak aged conditions. The parameters affecting impact strength were examined and it was concluded that various microstructural features affected toughness through their influence on tensile properties. In this steel the impact strength could be improved by lowering the UTS and increasing the ductility (pct elongation). The improvement in hardness and UTS was attributed to formation of thick precipitate-dislocation tangles. The aging process caused a slow transformation of lath martensite into acicular ferrite due to occurrence of in situ recrystallization. The concentration of Cu in particles precipitating on aging was followed using EDAX technique.

Keywords

HSLA steel thermomechanical aging Cu-bearing steel 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Densley J M and Hirth J P 1998Scr. Metall. 39 881CrossRefGoogle Scholar
  2. Dhua S K, Mukerjee D and Sarma D S 2001Metall. Mater. Trans. A32 2259CrossRefGoogle Scholar
  3. Duerig T W, Allison J E and Williams J C 1985Metall. Trans. A16 739Google Scholar
  4. Fox A G, Mikalac S and Vassilaros M G 1992Speich Symp. Proc. (Warrendale, PA: ISS) pp 1554–1561Google Scholar
  5. Gladman T, Duilieu D and Mclvor I D 1976Micro alloying’ 75 (Niagara Falls, NY: Union Carbide Corp.) p. 32Google Scholar
  6. Goodman S R, Brenner S S and Low Jr S S 1973Metall. Trans. A4 2363CrossRefGoogle Scholar
  7. Gordon J A, Hirth J P, Kumar A M and Moody Jr N E 1993Metall. Trans. A23 1013Google Scholar
  8. Hamano R 1993Metall. Trans. A24 127Google Scholar
  9. Higashi K, Hirari Y and Ohnishi T 1985J. Jpn. Inst. Light Met. 35 353Google Scholar
  10. Lee S, Kim B C and Kwon D 1998Metall. Trans. A24 1133Google Scholar
  11. Leslie W C 1981The physical metallurgy of steels (NY: McGraw Hill Book Co.) p. 133Google Scholar
  12. Miglin M T, Hirth J P and Rosenfield A R 1983Metall. Trans. A14 2055Google Scholar
  13. Mujahid M, Lis A K, Garcia C I and DeArdo A J 1998J. Mater. Eng. Perf. 7 247CrossRefGoogle Scholar
  14. Ranganathan S 1999Mater. Sci. Technol. 15 523CrossRefGoogle Scholar
  15. Sanders Jr T H and Starke Jr E A 1982Acta Metall. 30 927CrossRefGoogle Scholar
  16. Sharma M K 1996Effect of welding parameters on the structure, tproperties and silt erosion in 13/4 martensitic stainless steel, Ph D Thesis, University of Roorkee, RoorkeeGoogle Scholar
  17. Skoufari-Themistou L, Crowther D N and Mintz B 1999Mater. Sci. Technol. 15 1069Google Scholar
  18. Wilson A D, Hamburg E G, Colvin D J, Thompson S W and Krauss G 1988Proc. int. confon microalloyed HSLA steels, Microalloying’ 88 (Metals Park, OH: ASM International) pp 259–275Google Scholar

Copyright information

© Indian Academy of Sciences 2003

Authors and Affiliations

  • Sanjay Panwar
    • 1
  • D B Goel
    • 1
  • O P Pandey
    • 1
    • 2
  • K Satya Prasad
    • 1
    • 3
  1. 1.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyRoorkeeIndia
  2. 2.School of Physics and Materials ScienceThapar Institute of Engineering and TechnologyPatialaIndia
  3. 3.Defence Metallurgical Research LaboratoryHyderabadIndia

Personalised recommendations