Author
A.M. Sriramamurthy
Bio: A.M. Sriramamurthy is an academic researcher from Defence Metallurgical Research Laboratory. The author has contributed to research in topics: Creep & Superalloy. The author has an hindex of 2, co-authored 3 publications receiving 18 citations.
Topics: Creep, Superalloy, Software, Personal computer, Stress intensity factor
Papers
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TL;DR: In this article, the creep crack growth behavior of a directionally solidified (DS) cast nickel-base superalloy has been investigated at 1,033K and the results obtained are reported here.
14 citations
TL;DR: In this paper, a columnar-grained nickel-base superalloy has been evaluated over a wide temperature range (1033 to 1311 K) and stress levels (80 to 850 MPa).
Abstract: Creep-rupture properties of a columnar-grained nickel-base superalloy have been evaluated over a wide temperature range (1033 to 1311 K) and stress levels (80 to 850 MPa). Creep data analyses based on the conventional approach as well as on a new graphical method—the Β-envelope method (Ref 1)—have been carried out for creep strain and life estimation purposes. The relation between minimum creep rate of the alloy with the applied stress obeys simple power law, whereas the rupture data of the alloy fits well to the Larson-Miller parameter. Also, the Monkman-Grant relation between the minimum creep rate and the rupture life produces a trend with some degree of scatter in the data. The latter relation in its generalized form by the Β-envelope method exhibited the best correlation with significantly reduced scatter in the data.
5 citations
TL;DR: In this article, a generalized, interactive and user friendly application software has been developed for post data analysis of constant load creep crack growth (CCG) studies, which enables the user to correlate creep-crack growth rate with macroscopic crack-tip parameters such as the reference stress, σref, net section stress and σnet, stress intensity factor, K, and the energy rate integral, C* and Ct, of the time dependent fracture mechanics concepts.
1 citations
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TL;DR: In this article, high temperature fatigue crack growth in Inconel 718 has been studied at the temperatures 450 degrees C, 500 degrees C and 650 degrees C. The tests were conducted both without hold t...
57 citations
15 Nov 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In-phase TMF crack growth testing with different lengths of the hold time at the maximum temperature of 550 °C has been conducted on Inconel 718 specimens.
Abstract: In-phase TMF crack growth testing with different lengths of the hold time at the maximum temperature of 550 °C has been conducted on Inconel 718 specimens Focus has been on establishing a method f
57 citations
TL;DR: In this article, the CM 247 LC superalloy was remelted and cast to obtain the desired polycrystalline test bars by controlling casting parameters, followed by the investigation of precipitation morphology and mechanical properties.
Abstract: The CM 247 LC superalloy was remelted and cast to obtain the desired polycrystalline test bars by controlling casting parameters, followed by the investigation of precipitation morphology and mechanical properties. The experimental results show that by well-controlled casting parameters the CM 247 LC owns excellent castability to form a superalloy with fine grain structure, high strength as well as superior creep resistance.
45 citations
TL;DR: In this article, Ni-based HAYNES 230 and HASTELLOY X superalloys were studied at 816 and 927°C in laboratory air. And they showed that the fatigue cracking path became dominantly intergranular if the hold time increased to 2min, indicating that the timedependent creep damage mechanisms were in control.
25 citations
TL;DR: In-phase and out-of-phase thermomechanical fatigue tests on Ni-base Alloy 247 LC DS were carried out on directionally solidified Ni-Base Alloy 247LC DS.
21 citations