Journal of Petroleum & Environmental Biotechnology

Ray AK

Publications

• Research Article
  Uncertainty in Damage Assessment and Remaining Life Prediction of Engineering Materials Used In Petrochemical Industry
  Author(s): Ray AK, Roy N, Raj A, Matwa M, Davuluri A, Kumari A, Kumar P, Mundhada D, Kaushal V and Roy BNRay AK, Roy N, Raj A, Matwa M, Davuluri A, Kumari A, Kumar P, Mundhada D, Kaushal V and Roy BN
  
  In this paper creep damage assessment of about 11 years’ service exposed HP-40 grade of steel used in hydrogen reformer of a petrochemical industry has been carried out in terms of a discontinuous Markov process. Experimentally determined conventional creep data under identical testing condition were used in the present investigation. Scatter and damage accumulation due to creep deformation were evaluated through microstructural assessment using light optical microscope and scanning electron microscope. Quantification of creep damage was made from replicated creep data in terms of two damage parameters A and A*. Statistical analysis of void area fraction has been carried out extensively for the both top and bottom portions of the reformer tube at 870 o C in the stress range of 52-68 MPa. In addition, the proposed probabilistic model has been compared with the Kachanav’s Co.. View More»
  DOI: 10.4172/2157-7463.1000181

  Abstract PDF