Publications - Phanikumar Gandham - Page 1

Experimental and simulation studies of solidification behaviour in undercooled CuCoNi equiatomic medium entropy alloy

Phanikumar Gandham Rahul, M. R. Phanikumar, Gandham

Published in The European Physical Journal Special Topics

Undercooling studies were carried out in equiatomic CuCoNi system with an aim to understand the growth kinetics and microstructural variations as a function of undercooling. The morphological change in microstructure was observed and correlated with the undercooling obtained. Non-linear variation of growth velocity with respect to the increase in u...

Heat treatment design for IN718 by Laser metal deposition with high deposition rates: Modeling, simulation and experimen...

Zhong, Chongliang Narayana Samy, Venkatesh Pandian Pirch, Norbert Gasser, Andres Phanikumar Gandham

Published in Acta Materialia

Laser metal deposited processed Ni-based superalloy IN718 is characterized by elemental micro-segregation, anisotropy and Laves phases due to the rapid solidification and therefore needs homogenization heat treatment to achieve comparable properties of wrought alloys. In this paper, we report simulation based methodology to design heat treatment IN...

Design of a Seven-Component Eutectic High-Entropy Alloy

Phanikumar Gandham Rahul, M. R. Phanikumar, Gandham

Published in Metallurgical and Materials Transactions A

A eutectic high-entropy alloy with seven components (Fe, Ni, Cr, V, Co, Mn, and Nb) was designed via the melt route guided by CALPHAD predictions. Configurational entropy estimated for the two-phase microstructure qualifies it to be referred to as a high-entropy alloy. When the Nb content exceeded 9.7 at. pct, the microstructure changed from hypoeu...

Weld Solidification Cracking Behaviour of AA2195 Al–Cu–Li Alloy

Phanikumar Gandham Agilan, Muthumanickam Phanikumar, Gandham Sivakumar, Dhenuvakonda

Published in Transactions of the Indian Institute of Metals

In this study, weld solidification cracking behaviour of AA2195 Al–Cu–Li alloy was studied and compared with conventional AA2219 and AA2014 aluminium alloys. Cracking susceptibility was evaluated using varestraint test and Gleeble® hot ductility test and the slope of liquidus temperature as function of liquid fraction was also evaluated. Solidifica...