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  1. Book ; Online: IIT Hyderabad director calls for alternatives to ventilators

    Murty, B S

    2020  

    Abstract: Indian Institute of Technology Hyderabad director Prof BS Murty has asked the Central government to consider adopting ‘bag valve masks’ as an alternative to meet any surge in demand for ventilators to treat COVID-19 patients. ...

    Abstract Indian Institute of Technology Hyderabad director Prof BS Murty has asked the Central government to consider adopting ‘bag valve masks’ as an alternative to meet any surge in demand for ventilators to treat COVID-19 patients.
    Keywords IITH in News ; covid19
    Language English
    Publishing date 2020-03-30
    Publisher Telangana Today
    Publishing country in
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Interface Response Functions for multicomponent alloy solidification- An application to additive manufacturing

    Hariharan, V. S. / Murty, B. S. / Phanikumar, Gandham

    2023  

    Abstract: The near-rapid solidification conditions during additive manufacturing can lead to selection of non-equilibrium phases. Sharp interface models via interface response functions have been used earlier to explain the microstructure selection under such ... ...

    Abstract The near-rapid solidification conditions during additive manufacturing can lead to selection of non-equilibrium phases. Sharp interface models via interface response functions have been used earlier to explain the microstructure selection under such solidification conditions. However, most of the sharp interface models assume linear superposition of contributions of alloying elements without considering the non-linearity associated with the phase diagram. In this report, both planar and dendritic Calphad coupled sharp interface models have been implemented and used to explain the growth-controlled phase selection observed at high solidification velocities relevant to additive manufacturing. The implemented model predicted the growth-controlled phase selection in multicomponent alloys, which the other models with linear phase diagram could not. These models are calculated for steels and a Nickel-based superalloy and the results are compared with experimental observations.

    Comment: 33 pages, 11 figures, preprint
    Keywords Condensed Matter - Materials Science
    Subject code 669
    Publishing date 2023-03-14
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Enhanced thermoelectric properties of In-filled Co

    Ghosh, Sanyukta / Jain, Shubhanth / Mishra, Soumya Ranjan / Rogl, Gerda / Rogl, Peter / Bauer, Ernst / Murty, B S / Govindaraj, A / Mallik, Ramesh Chandra

    Dalton transactions (Cambridge, England : 2003)

    2024  Volume 53, Issue 2, Page(s) 715–723

    Abstract: Uniform dispersion of nanosized secondary phases in bulk thermoelectric materials has proven to be an effective strategy to reduce the lattice part of thermal conductivity and improve the thermoelectric efficiency. In this work, reduced graphene oxide ( ... ...

    Abstract Uniform dispersion of nanosized secondary phases in bulk thermoelectric materials has proven to be an effective strategy to reduce the lattice part of thermal conductivity and improve the thermoelectric efficiency. In this work, reduced graphene oxide (rGO) was uniformly dispersed in the In
    Language English
    Publishing date 2024-01-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt03399f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Strength-Ductility Synergy in High Entropy Alloys by Tuning the Thermo-Mechanical Process Parameters: A Comprehensive Review.

    Sabban, Rushikesh / Dash, K / Suwas, S / Murty, B S

    Journal of the Indian Institute of Science

    2022  Volume 102, Issue 1, Page(s) 91–116

    Abstract: The strength-ductility trade-off is an eminent factor in deciding the mechanical performance of a material with regard to specific applications. The strength-ductility synergy is generally inadequate in as-synthesized high entropy alloys (HEAs); however, ...

    Abstract The strength-ductility trade-off is an eminent factor in deciding the mechanical performance of a material with regard to specific applications. The strength-ductility synergy is generally inadequate in as-synthesized high entropy alloys (HEAs); however, it can be tailored owing to its tunable microstructure and phase stability. Thermo-mechanical processing (TMP) allows the microstructure to be tailored to achieve desired strength-ductility combination. The additional attribute is evolution of texture, which also significantly influences the mechanical properties. This review presents a critical insight into the role of TMP to achieve superior strength-ductility symbiosis at room temperature in single-phase (FCC, BCC) and multiphase HEA. The role of overall processing strategy of HEAs encompassing rolling and subsequent annealing in relation to the evolution of microstructure and texture in have been discussed. Recently practiced severe plastic deformation processes have also shown promise in improving the strength-ductility combination. The relevance of these processes in the processing of HEAs has also been analysed. At the end, futuristic approaches have been elaborated to enable efficient as well as hassle-free process towards achieving the proficiency of strength-ductility in HEAs.
    Language English
    Publishing date 2022-03-24
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2139553-6
    ISSN 0970-4140 ; 0970-4140 ; 0019-4964
    ISSN (online) 0970-4140
    ISSN 0970-4140 ; 0019-4964
    DOI 10.1007/s41745-022-00299-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Effect of milling on the oxidation kinetics of Aluminium + Boron mixture and nanocrystalline Aluminium Boride (AlB12)

    Adil, Shaik / Murty, B.S

    Thermochimica acta. 2019 Aug., v. 678

    2019  

    Abstract: The present work deals with the oxidation behaviour of mechanically alloyed (MA) mixture of Al + B (Al-17.3 wt.% and B-82.7 wt.%) and aluminium boride (AlB12) in the air using thermogravimetric-differential thermal analysis (TG-DTA). An extent of ... ...

    Abstract The present work deals with the oxidation behaviour of mechanically alloyed (MA) mixture of Al + B (Al-17.3 wt.% and B-82.7 wt.%) and aluminium boride (AlB12) in the air using thermogravimetric-differential thermal analysis (TG-DTA). An extent of oxidation (conversion, α) of 0.67 was observed for B, and the addition of aluminium to boron increased the conversion to 0.82 and MA of the Al + B mixture for 6 h has led to a further increase in conversion to 0.88. The onset temperature of oxidation and final conversion level showed significant variations between unmilled mixture of Al + B, after MA for 6 h and nanocrystalline AlB12 when heated in air at a constant heating rate of 10 K min−1 till 1473 K. Vyazovkin’s method was adopted to evaluate the kinetic parameters and the apparent activation energy was determined for B, Al + B (0 h–6 h MA) and nanocrystalline AlB12. A higher conversion value (α = 0.94) and low average activation energy (96 ± 2 kJ mol-1) was obtained for nanocrystalline AlB12.
    Keywords activation energy ; air ; aluminum ; boron ; differential thermal analysis ; heat ; milling ; nanocrystals ; oxidation ; temperature ; thermogravimetry
    Language English
    Dates of publication 2019-08
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1500974-9
    ISSN 0040-6031
    ISSN 0040-6031
    DOI 10.1016/j.tca.2019.178306
    Database NAL-Catalogue (AGRICOLA)

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  6. Book ; Online: Designing a thermodynamically stable and intrinsically ductile refractory alloy

    Shaikh, Sufyan M. / Murty, B. S. / Yadav, Satyesh K.

    2022  

    Abstract: Developing ductile refractory BCC alloys has remained a challenge. The intrinsic ductility (D) of an alloy is the ratio of surface energy ($\gamma_s$) and unstable stacking fault energy ($\gamma_{usfe}$). Lowering the valence electron concentration has ... ...

    Abstract Developing ductile refractory BCC alloys has remained a challenge. The intrinsic ductility (D) of an alloy is the ratio of surface energy ($\gamma_s$) and unstable stacking fault energy ($\gamma_{usfe}$). Lowering the valence electron concentration has been shown to improve the intrinsic ductility of refractory alloys. However, Re has been widely used to ductilize W, contrary to the low valency criteria suggested in the literature. Here we use density functional theory to calculate the enthalpy of formation, $\gamma_{usfe}$ and $\gamma_s$ of Group IV, V, VI elements and their 25 equiatomic binary alloys in BCC crystal structure. We found that positive enthalpy leads to a considerable reduction in $\gamma_{usfe}$ compared to composition averaged value, resulting in improved intrinsic ductility. Enthalpy is maximum at the equiatomic concentrations indicating the highly repulsive interaction between the alloy constituents and vicer-versa. We found that the repulsive interaction between the alloy constituents leads to a reduction in $\gamma_{usfe}$, making alloys intrinsically ductile.

    Comment: 19 pages, 6 figures
    Keywords Condensed Matter - Materials Science
    Subject code 669
    Publishing date 2022-03-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: ICME framework to simulate microstructure evolution during laser powder bed fusion of Haynes 282 nickel-based superalloy

    Hariharan, V. S. / Pramod, S. / Kesavan, D. / Murty, B. S. / Phanikumar, Gandham

    Journal of materials science. 2022 June, v. 57, no. 21

    2022  

    Abstract: Haynes 282 is a creep-resistant, γ′ strengthened nickel-based superalloy with excellent weldability. Additive manufacturing, especially laser powder bed fusion (LPBF), of Haynes 282 is being researched for its potential applications in aerospace and ... ...

    Abstract Haynes 282 is a creep-resistant, γ′ strengthened nickel-based superalloy with excellent weldability. Additive manufacturing, especially laser powder bed fusion (LPBF), of Haynes 282 is being researched for its potential applications in aerospace and power generation sectors. LPBF enables us to achieve desired properties via microstructure control through process parameter optimization. Integrated computational materials engineering (ICME) approach can be used to tune the process parameters to obtain desired microstructure, instead of trial-and-error methods. In this report, ICME framework has been established to simulate microstructural evolution during LPBF and post-processing of Haynes 282. A dimensionless number was used to optimize the process parameters with minimal porosity. Thermal modelling was performed using a semi-analytical model and the obtained thermal data was used to simulate solidification during LPBF. The corresponding cell spacing obtained matched closely with the experimental data. The segregation pattern extracted from the phase-field model was used as input for homogenization simulation. The γ′ precipitate evolution was predicted using Langer–Schwartz theory and Kampmann–Wagner-Numerical (KWN) approach. The predicted values agreed with the experimentally measured values. The room temperature yield strength of as-built samples was comparable and that of heat-treated samples were superior to the aged wrought material.
    Keywords ambient temperature ; heat treatment ; homogenization ; mathematical models ; microstructure ; porosity ; power generation ; solidification ; superalloys
    Language English
    Dates of publication 2022-06
    Size p. 9693-9713.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-022-07170-3
    Database NAL-Catalogue (AGRICOLA)

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  8. Book ; Online: Covid-19

    Murty, B S / Eswaran, Vinayak

    Shortage of ventilators; IIT team pitches Bag Valve Mask as alternative

    2020  

    Abstract: A team of IIT-Hyderabad professors has pitched for adopting bag valve masks as alternatives to ventilators. ...

    Abstract A team of IIT-Hyderabad professors has pitched for adopting bag valve masks as alternatives to ventilators.
    Keywords Mechanical and aerospace ; covid19
    Language English
    Publishing date 2020-03-31
    Publisher India Today
    Publishing country in
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: COVID-19

    Murty, B S / Eswaran, Vinayak

    IIT-H suggests cheaper alternative to ventilators

    2020  

    Abstract: The Indian Institute of Technology at Hyderabad (IITH) has suggested an affordable, portable and fast-tomake alternative to ventilators that can be produced in bulk for less than Rs. 5,000 a device to fight the Covid-19 outbreak. ...

    Abstract The Indian Institute of Technology at Hyderabad (IITH) has suggested an affordable, portable and fast-tomake alternative to ventilators that can be produced in bulk for less than Rs. 5,000 a device to fight the Covid-19 outbreak.
    Keywords Mechanical and aerospace ; covid19
    Language English
    Publishing date 2020-03-31
    Publisher Economic Times
    Publishing country in
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Book ; Online: ‘Bag valve masks’ pitched as alternatives to ventilators

    Murty, B S / Eswaran, Vinayak

    2020  

    Abstract: B.S. Murty, Director of the Indian Institute of Technology – Hyderabad, has urged the government to consider the use of ‘bag valve masks’ as an alternative to meet any surge in demand for ventilators, in the wake of the coronavirus (COVID-19) ... ...

    Abstract B.S. Murty, Director of the Indian Institute of Technology – Hyderabad, has urged the government to consider the use of ‘bag valve masks’ as an alternative to meet any surge in demand for ventilators, in the wake of the coronavirus (COVID-19) pandemic
    Keywords Mechanical and aerospace ; covid19
    Language English
    Publishing date 2020-03-31
    Publisher The Hindu
    Publishing country in
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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