Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map


Publication Details

Indian Institute of Technology (IIT) Patna 
Bimal Das, Akhilendra Singh: . 
Corresponding Authors:
Bimal Das 
DOI #:
Influence of hydrogen on the low cycle fatigue performance of P91 steel 
International Journal of Hydrogen Energy 
Low cycle fatigue, Fatigue life, Cyclic softening, Quasi cleavage, Chaboche kinematic hardening 
The present work aims to assess the influence of hydrogen on strain controlled low cycle fatigue (LCF) properties of P91 steel. Specimens were electrochemically charged using H2SO4 solution, subsequently uniaxial tensile and LCF tests were performed at ambient temperature. An increase in strength and reduction in elongation are noticed for hydrogen charged samples relative to as received or uncharged specimens. Hydrogenated specimens depict drastic reduction in fatigue life as compared to the uncharged specimens. Irrespective of imposed strain amplitude, P91 steel show cyclic softening nature throughout its life. The peak stress amplitude and rate of cyclic softening for hydrogenated specimens are found to be more than the as received specimens at all strain amplitudes. The magnitude of proportional limit from master curve depicts that as received specimen exhibit near Masing behavior whereas hydrogenated specimens reveal non-Masing behavior. Local misorientation analyses carried out by electron back scattered diffraction technique are correlated with the evolution of local plastic strain and substructural development. The fracture morphology of tensile test transformed from dimple failure for uncharged specimen to quasi cleavage fracture for hydrogenated specimens. Finite element simulation considering Chaboche kinematic hardening rule is utilized to simulate the cyclic stressstrain behavior of as received and hydrogenated specimens.  
Entered by:
Venkata Dantham on 2020-08-04 
I-Mitra(आई-मित्र) Welcomes You..
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2020 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.