Journal of Materials Science

, Volume 31, Issue 10, pp 2705–2709 | Cite as

Evaluation of hot hardness and creep of a 350 grade commercial maraging steel

  • U. K. Viswanathan
  • T. R. G. Kutty
  • R. Keswani
  • C. Ganguly


The hardening response and the indentation creep of a 350 grade commercial maraging steel were evaluated using a hot hardness tester. The hardness versus temperature plot exhibited three distinct regions. Hardness response was noted between 500–800 K. The unusually high values of activation energy and stress exponent obtained during the creep experiment could be rationalized by a novel concept of introducing a back stress term in the indentation creep relation. The corrected value of the activation energy was found to be reasonably in agreement with the activation energy for diffusion of Ni in iron. Results are supplemented with microstructural observation.


Iron Polymer Activation Energy Distinct Region Hardness Tester 
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Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • U. K. Viswanathan
    • 1
  • T. R. G. Kutty
    • 1
  • R. Keswani
    • 1
  • C. Ganguly
    • 1
  1. 1.Radiometallurgy DivisionBhabha Atomic Research CentreBombayIndia

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