V.D. Vijayanand
Indira Gandhi Centre for Atomic Research
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Featured researches published by V.D. Vijayanand.
Materials at High Temperatures | 2015
J. Ganesh Kumar; V.D. Vijayanand; M. Nandagopal; K. Laha
Tensile strength variation across 316LN stainless steel fusion welded joint comprising of base metal, deposited weld metal and heat affected zone (HAZ) has been evaluated by Automated Ball Indentation (ABI) technique. Automated Ball Indentation tests were conducted on the various zones of the steel weld joint at 300, 523 and 923 K. The flow curves obtained from ABI results were consistent with corresponding conventional uniaxial tensile test results. The HAZ exhibited higher tensile strength than the other regions of the steel weld joint at all investigated temperatures. The ratio of ultimate tensile strength to yield stress (YS), which represents the work hardening behaviour, increased with an increase in temperature for the base metal and HAZ; whereas it remained nearly the same for the weld metal.
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2016
V.D. Vijayanand; M. Vasudevan; V. Ganesan; P. Parameswaran; K. Laha; A.K. Bhaduri
Abstract Creep deformation and rupture behavior of single-pass and dual-pass 316LN stainless steel (SS) weld joints fabricated by an autogenous activated tungsten inert gas welding process have been assessed by performing metallography, hardness, and conventional and impression creep tests. The fusion zone of the single-pass joint consisted of columnar zones adjacent to base metals with a central equiaxed zone, which have been modified extensively by the thermal cycle of the second pass in the dual-pass joint. The equiaxed zone in the single-pass joint, as well as in the second pass of the dual-pass joint, displayed the lowest hardness in the joints. In the dual-pass joint, the equiaxed zone of the first pass had hardness comparable to the columnar zone. The hardness variations in the joints influenced the creep deformation. The equiaxed and columnar zone in the first pass of the dual-pass joint was more creep resistant than that of the second pass. Both joints possessed lower creep rupture life than the base metal. However, the creep rupture life of the dual-pass joint was about twofolds more than that of the single-pass joint. Creep failure in the single-pass joint occurred in the central equiaxed fusion zone, whereas creep cavitation that originated in the second pass was blocked at the weld pass interface. The additional interface and strength variation between two passes in the dual-pass joint provides more restraint to creep deformation and crack propagation in the fusion zone, resulting in an increase in the creep rupture life of the dual-pass joint over the single-pass joint. Furthermore, the differences in content, morphology, and distribution of delta ferrite in the fusion zone of the joints favors more creep cavitation resistance in the dual-pass joint over the single-pass joint with the enhancement of creep rupture life.
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2018
V.D. Vijayanand; S. D. Yadav; P. Parameswaran; K. Laha; P. K. Parida; G. V. P. Reddy
The austenitic stainless steel weld metal fabricated by multipass welding exhibits a composite microstructure. Microstructural characterization of the weld metal revealed that there are two distinct regions on either side of the weld-pass interface. The variations in dislocation substructure and delta ferrite morphology are the two microstructural attributes which delineate these regions. The generation of subsequent thermal cycles during the fabrication of multipass weld joint is the paramount factor influencing the formation of the composite microstructure. During creep exposure, the extent of creep cavitation and propagation varies substantially in these two regions due to differences in their microstructures. This results in preferential damage during creep exposure of austenitic stainless steel weld metal.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2014
V.D. Vijayanand; K. Laha; P. Parameswaran; V. Ganesan; M.D. Mathew
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2012
Naveena; V.D. Vijayanand; V. Ganesan; K. Laha; M.D. Mathew
Procedia Engineering | 2013
J. Ganesh Kumar; V. Ganesan; V.D. Vijayanand; K. Laha; M.D. Mathew
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2017
Kanhu Charan Sahoo; J. Vanaja; P. Parameswaran; V.D. Vijayanand; K. Laha
International Journal of Pressure Vessels and Piping | 2016
A.K. Bhaduri; K. Laha; V. Ganesan; T. Sakthivel; M. Nandagopal; G.V. Prasad Reddy; J. Ganesh Kumar; V.D. Vijayanand; S. Panneer Selvi; G. Srinivasan; C. R. Das; A. Nagesha; S. Ravi; P. Parameswaran; R. Sandhya; S. K. Albert
Procedia Engineering | 2013
Naveena; V.D. Vijayanand; V. Ganesan; K. Laha; M.D. Mathew
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2017
V. Thomas Paul; V.D. Vijayanand; C. Sudha; S. Saroja