Institution
Defence Metallurgical Research Laboratory
Facility•Hyderabad, India•
About: Defence Metallurgical Research Laboratory is a facility organization based out in Hyderabad, India. It is known for research contribution in the topics: Microstructure & Alloy. The organization has 1208 authors who have published 2662 publications receiving 51663 citations.
Topics: Microstructure, Alloy, Ultimate tensile strength, Creep, Coercivity
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors explore the mechanical behaviour of the intermetallic Ti2AlNb over a wide range of strain rates and temperatures, showing that at low temperatures the flow behavior is controlled by a strong thermally activated process with small activation volumes typical of a Peierls-type barrier.
44 citations
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10 Aug 2013-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the authors describe the tensile flow and work hardening behavior of a high strength 7010 aluminum alloy by constitutive relations and find that both the Ludwigson and a generalized Voce-Bergstrom relation adequately describe the present alloy in all conditions compared to the Hollomon relation.
Abstract: The present work describes the tensile flow and work hardening behavior of a high strength 7010 aluminum alloy by constitutive relations. The alloy has been hot rolled by three different cross-rolling schedules. Room temperature tensile properties have been evaluated as a function of tensile axis orientation in the as-hot rolled as well as peak aged conditions. It is found that both the Ludwigson and a generalized Voce-Bergstrom relation adequately describe the tensile flow behavior of the present alloy in all conditions compared to the Hollomon relation. The variation in the Ludwigson fitting parameter could be correlated well with the microstructural features and anisotropic contribution of strengthening precipitates in the as-rolled and peak aged conditions, respectively. The hardening rate and the saturation stress of the first Voce-Bergstrom parameter, on the other hand, depend mainly on the crystallographic texture of the specimens. It is further shown that for the peak aged specimens the uniform elongation (epsilon(u)) derived from the Ludwigson relation matches well with the measured epsilon(u) irrespective of processing and loading directions. However, the Ludwigson fit overestimates the epsilon(u) in case of the as-rolled specimens. The Hollomon fit, on the other hand, predicts well the measured epsilon(u), of the as-rolled specimens but severely underestimates the epsilon(u), for the peak aged specimens. Contrarily, both the relations significantly overestimate the UTS of the as-rolled and the peak aged specimens. The Voce-Bergstrom parameters define the slope of e Theta-sigma plots in the stage-III regime when the specimens show a classical linear decrease in hardening rate in stage-III. Further analysis of work hardening behavior throws some light on the effect of texture on the dislocation storage and dynamic recovery.
44 citations
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TL;DR: In this paper, the authors compared the room temperature erosion behavior of three stainless steels, namely 304, 316 and 410 SS, at three impact angles (30°, 60° and 90°) and at two impact velocities (98 and 129 m s−1) for each angle.
44 citations
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15 Dec 2007-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the effect of beam oscillation technique using elliptical waveform on fatigue life of Ti-6Al-4V electron beam weldments was investigated and the beam oscillated weldments exhibited lower strength (hardness) compared to those made without beam oscillations.
Abstract: The present study deals with the effect of beam oscillation technique using elliptical waveform on fatigue life of Ti–6Al–4V electron beam weldments. Autogenous full penetration bead-on-plate electron beam welds were made with and without beam oscillation. Some welds were subjected to post-weld heat treatment (PWHT) at two different temperatures (700 and 900 °C). Room temperature hardness, tensile properties and fatigue life of the weldments in the as-welded and PWHT conditions were studied and correlated with the microstructure. The beam oscillated weldments exhibited lower strength (hardness) compared to those made without beam oscillation. This was attributed to wider diffusional α plates in the beam oscillated welds due to lower cooling rates. The beam oscillated weldments exhibited inferior fatigue lives compared with unoscillated weldments owing to the presence of wider α platelets in the former. As the width of α platelets in the weldments subjected to PWHT at 700 °C was smaller than that in the weldments subjected to PWHT at 900 °C, they exhibited longer fatigue lives.
44 citations
Authors
Showing all 1215 results
Name | H-index | Papers | Citations |
---|---|---|---|
Rajiv S. Mishra | 64 | 591 | 22210 |
G. Sundararajan | 46 | 241 | 8402 |
Dipankar Banerjee | 44 | 366 | 9025 |
Satyam Suwas | 43 | 412 | 7655 |
G. Madhusudhan Reddy | 38 | 168 | 4580 |
Animesh Dutta | 38 | 299 | 7014 |
Om Prakash Pandey | 37 | 441 | 6403 |
Shrikant V. Joshi | 34 | 229 | 4119 |
Arumugam Pandurangan | 34 | 183 | 3708 |
Dibyendu Ganguli | 33 | 147 | 3122 |
K. T. Jacob | 33 | 364 | 5026 |
E. S. R. Gopal | 31 | 237 | 4191 |
Rahul Mitra | 31 | 191 | 3698 |
Bhaskar Majumdar | 30 | 160 | 3065 |
Jainagesh A. Sekhar | 29 | 219 | 2524 |