Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Ramkumar Oruganti"'
Autor:
Sanket Sarkar, Yan Gao, Shenyan Huang, Saswata Bhattacharya, Swapnil Patil, Ramkumar Oruganti
Publikováno v:
Crystals, Vol 10, Iss 4, p 306 (2020)
According to Eshelby’s theory, inelastically inhomogeneous inclusions in a metallic matrix give rise to a distribution of internal stresses. In the case of particle strengthened materials, such as nickel base superalloys, the presence and evolution
Externí odkaz:
https://doaj.org/article/d723b881faa14332825999da27c6a57b
Publikováno v:
Metallurgical and Materials Transactions A. 50:191-198
A linear relationship between mobile dislocation density and creep strain has generally been assumed in various models of creep in Ni-base superalloys. No stress or temperature dependence is assumed in such relationships. The current study aims to ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1db732cbc959c6168b68e17d05d6ce38
https://doi.org/10.1007/s11661-018-4971-y
https://doi.org/10.1007/s11661-018-4971-y
Autor:
Swapnil Patil, Saswata Bhattacharya, Yan Gao, Shenyan Huang, Sanket Sarkar, Ramkumar Oruganti
Publikováno v:
Crystals
Volume 10
Issue 4
Crystals, Vol 10, Iss 306, p 306 (2020)
Volume 10
Issue 4
Crystals, Vol 10, Iss 306, p 306 (2020)
According to Eshelby&rsquo
s theory, inelastically inhomogeneous inclusions in a metallic matrix give rise to a distribution of internal stresses. In the case of particle strengthened materials, such as nickel base superalloys, the presence and
s theory, inelastically inhomogeneous inclusions in a metallic matrix give rise to a distribution of internal stresses. In the case of particle strengthened materials, such as nickel base superalloys, the presence and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a3814485b2783783786158d3ef7b483
https://doi.org/10.3390/cryst10040306
https://doi.org/10.3390/cryst10040306
Autor:
Arthur S. Peck, Adarsh Shukla, T. Vishwanath, Daniel Wei, Kenneth Rees Bain, Girish Shastry, Francesco Mastromatteo, Michael Douglas Arnett, Sanjay Kumar Sondhi, Sachin Nalawade, Jon Conrad Schaeffer, Ramkumar Oruganti, Andrew Ezekiel Wessman, Andrew Martin Powell, Sanket Sarkar, K. G. V. Sivakumar
Publikováno v:
Journal of Engineering Materials and Technology. 141
This paper outlines a microstructure-based model relating gamma prime microstructure and grain size of Ni-base alloys to their creep behavior. The ability of the model to explain creep of multiple superalloys with a single equation and parameter set
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58ce0f7e648592e9beb0dc7fc88a7ae1
https://doi.org/10.1115/1.4040554
https://doi.org/10.1115/1.4040554
Autor:
Ramkumar Oruganti
Publikováno v:
Transactions of the Indian Institute of Metals. 69:555-559
This article outlines the work being carried out at GE Global Research, Bangalore in the area of creep modeling and remaining life assessment of ferritic steels and superalloys. Fundamental insights into the commonalities and differences between cree
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3a9531408d740e613793b69acf640ca
https://doi.org/10.1007/s12666-015-0760-0
https://doi.org/10.1007/s12666-015-0760-0
Publikováno v:
Procedia Engineering. 55:727-734
This article presents the findings of recent studies on creep of advanced 9-10% Cr ferritic steels. It is shown that the obstacles that fundamentally control creep in these steels are nano-scale MX carbonitrides whose time dependent coarsening leads
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b86c5636d8bb3ca619a67b93ec1ef1ff
https://doi.org/10.1016/j.proeng.2013.03.322
https://doi.org/10.1016/j.proeng.2013.03.322
Autor:
Ramkumar Oruganti
Publikováno v:
Acta Materialia. 60:1695-1702
A new approach to dislocation creep is proposed based on a reappraisal of diffusion controlled glide as outlined by Hirth and Lothe. It is argued that creep may be viewed as a process of thermally activated release of dislocations from pinning center
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9b1c4b3bf171c96290b4ed76d47f0fd
https://doi.org/10.1016/j.actamat.2011.11.051
https://doi.org/10.1016/j.actamat.2011.11.051
Publikováno v:
Acta Materialia. 59:2145-2155
The key microstructural features that control creep in advanced 9–10%Cr steels are elucidated. Conclusive evidence for the presence and coarsening of nano-scale MX carbonitrides which contribute to the long-term stability of these materials is pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0819188a9b1d50c1b5decd32900ed6e
https://doi.org/10.1016/j.actamat.2010.12.015
https://doi.org/10.1016/j.actamat.2010.12.015
Autor:
Amit K. Ghosh, Ramkumar Oruganti
Publikováno v:
Acta Materialia. 56:726-735
The results of an analysis of creep deformation in hexagonal and circular honeycomb structures using an elastic–plastic finite element method are reported here. Representative unit cells of transverse sections of the honeycomb structures were subje
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74fec00972150abf1b75574ae98631d1
https://doi.org/10.1016/j.actamat.2007.10.019
https://doi.org/10.1016/j.actamat.2007.10.019
Autor:
Amit K. Ghosh, Ramkumar Oruganti
Publikováno v:
Acta Materialia. 55:6074-6083
This paper reports a novel technique to fabricate hexagonal honeycomb structures. Here, a low-melting coating on stacked circular tubes is used to form liquid bridges at the tube junctions upon heating. The surface tension in these bridges then pulls
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d6fe8a00f58359e24de6c59ca94839d
https://doi.org/10.1016/j.actamat.2007.07.031
https://doi.org/10.1016/j.actamat.2007.07.031