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  1. No Access

    Article

    Corrosion behaviour of heat treated boron free and boron containing Ti–13Zr–13Nb (wt%) alloy in simulated body fluid

    The corrosion behaviour of heat treated Ti–13Zr–13Nb (TZN) and Ti–13Zr–13Nb–0.5B (TZNB) alloys in Hank’s solution has been investigated. The microstructure of the heat treated TZN alloy consisted of α, β or ma...

    P. Majumdar, S. B. Singh, U. K. Chatterjee… in Journal of Materials Science: Materials in… (2011)

  2. No Access

    Article

    Diode Laser Assisted Surface Nitriding of Ti-6Al-4V: Properties of the Nitrided Surface

    In the present study, a detailed investigation of mechanical and electrochemical properties of laser-surface-nitrided Ti-6Al-4V has been carried out. Laser treatment is carried out by melting the surface of Ti...

    Amit Biswas, Lin Li, U.K. Chatterjee… in Metallurgical and Materials Transactions A (2009)

  3. No Access

    Article

    Kinetics of Solid-State Reactions in Al-Li-Cu-Mg-Zr Alloys from Calorimetric Studies

    Differential scanning calorimetric (DSC) studies at different heating rates have been carried out to examine the solid-state reactions in 1441 and 8090 Al-Li-Cu-Mg-Zr alloys of water-quenched (WQ) and retrogre...

    K.S. Ghosh, K. Das, U.K. Chatterjee in Metallurgical and Materials Transactions A (2007)

  4. No Access

    Article

    Calorimetric studies of 8090 and 1441 Al–Li–Cu–Mg–Zr alloys of conventional and retrogressed and reaged tempers

    The differential scanning calorimetry (DSC) technique has been used to examine the solid state reactions of GPB zones formation, precipitation of δ′, T1, T2, S′, δ phases and their dissolution occurring in the 80...

    K. S. Ghosh, K. Das, U. K. Chatterjee in Journal of Materials Science (2007)

  5. No Access

    Article

    Electrochemical behaviour of retrogressed and reaged (RRA) 8090 and 1441 Al–Li–Cu–Mg–Zr alloys

    8090 and 1441 Al–Li–Cu–Mg–Zr alloys of peak aged T8 tempers were subjected to retrogression treatment followed by reageing to peak aged (RRA) T77 tempers. Electrochemical polarization studies were carried out ...

    K.S. Ghosh, K. Das, U.K. Chatterjee in Journal of Applied Electrochemistry (2006)

  6. No Access

    Article

    Surface oxides and their effect on the oxidation behavior of amorphous and nanoquasicrystalline Zr-Pd and Zr-Pt alloys

    The oxidation behavior of melt-spun Zr75Pd25 and Zr80Pt20 alloys with nanoquasicrystalline phase embedded in amorphous matrix has been studied isothermally as well as nonisothermally in static air. The nature of ...

    K. Mondal, U. K. Chatterjee, B. S. Murty in Journal of Materials Research (2006)

  7. No Access

    Chapter and Conference Paper

    Stress Corrosion Cracking of 18Mn-4Cr Generator Rotor End-Retaining Ring Steel

    18Mn-4Cr austenitic steel has virtually been the standard material for the rotor end-retaining rings in power generation plants during the period of 1960–1980, before it was replaced by the 18Mn-18Cr variety. ...

    N. Mukhopadhyay, U. K. Chatterjee in Fracture of Nano and Engineering Materials… (2006)

  8. No Access

    Article

    Studies of retrogression and reaging behavior in a 1441 Al-Li-Cu-Mg-Zr alloy

    A 1441 Al-Li-Cu-Mg-Zr alloy in the peak-aged T8 temper was subjected to retrogression treatment and immediately reaged to various tempers. Transmission electron microscopy (TEM), X-ray diffraction (XRD), diffe...

    K. S. Ghosh, K. Das, U. K. Chatterjee in Metallurgical and Materials Transactions A (2005)

  9. No Access

    Article

    Characterization of retrogression and reaging behavior of 8090 Al-Li-Cu-Mg-Zr alloy

    An 8090 Al-Li-Cu-Mg-Zr alloy in the peak-aged (T8) temper was subjected to retrogression treatment at temperatures above and below the δ′ (Al3Li) solvus line and immediately reaged to various tempers. Retrogressi...

    K. S. Ghosh, K. Das, U. K. Chatterjee in Metallurgical and Materials Transactions A (2004)

  10. No Access

    Article

    Effect of microstructure on hydrogen embrittlement of weld-simulated HSLA-80 and HSLA-100 steels

    HSLA-80 and HSLA-100 steels have been subjected to weld-simulated grain-coarsened heat-affected zone (GCHAZ) and grain-refined heat-affected zone (GRHAZ) treatments at peak temperatures of 1350 °C and 950 °C, ...

    K. Banerjee, U. K. Chatterjee in Metallurgical and Materials Transactions A (2003)

  11. No Access

    Article

    Dual band multi-branch lasing from a hybrid CO2 laser

    By judicious imposition of longitudinal mode control onto a resonator cavity, the Q-value of which increases with decreasing wavelength in the 11 to 9 μm region, simultaneous oscillation was obtained on all th...

    D. J. Biswas, J. P. Nilaya, U. K. Chatterjee in Optical and Quantum Electronics (1997)

  12. No Access

    Chapter

    Amplification of the Temporally Stretched Yellow Beam of the Copper Vapour Laser

    Amplification of temporally stretched yellow beam of the copper vapour laser in a Rh6G dye amplifier is reported. Effect of high signal intensities on the amplifier extraction efficiency was investigated exper...

    Sunita Singh, K. Dasgupta, S. Kundu, S. Kumar, L. G. Nair… in Pulsed Metal Vapour Lasers (1996)

  13. No Access

    Article

    Stress corrosion cracking and component failure: Causes and prevention

    The century-old problem of stress corrosion cracking (SCC) in metals and alloys has been reviewed highlighting the metallurgical factors like grain boundary precipitation and grain boundary segregation contrib...

    U K Chatterjee in Sadhana (1995)

  14. No Access

    Article

    Four-branch oscillation from a dual-polarization cavity CO2 laser

    We report here for the first time multiline oscillation of a cw-CO2 laser on all the four branches 10P, 10R, 9P, and 9R where all laser wavelengths share a common gain medium. The 9R, 9P and 10R branch lines lase...

    D. J. Biswas, P. Nilaya, U. K. Chatterjee in Applied Physics B (1993)

  15. No Access

    Article

    A model for short pulse absorption in a real SF6 saturable absorber

    This paper describes a rate equation model that has been formulated for an SF6 saturable absorber. The model includes three transitions in the ν 3 ladder and one hot band transition along with intramolecular V-V ...

    Paramita Deb, U. K. Chatterjee in Optical and Quantum Electronics (1993)

  16. No Access

    Article

    Influence of sulfide inclusion on ductility and fracture behavior of resulfurized HY-80 steel

    The influence of sulfide inclusions on the ductile fracture process of experimental HY-80 steels having graded sulfur levels from 50 to 500 ppm and heat-treated to different strength levels was studied with re...

    D. K. Biswas, M. Venkatraman, C. S. Narendranath… in Metallurgical Transactions A (1992)

  17. No Access

    Article

    Design and the operational characteristics of a 16 µ CF4 laser

    The design and the operational characteristics of a CO2 laser pumped CF4 laser developed at BARC are reported. Output energies of up to 20 mJ have been obtained at 615 cm−1 with an absorbed energy conversion effi...

    P K Gupta, V P Singhal, N S Shikarkhane, S Sinha, S Sasikumar, U Nundy… in Pramana (1990)

  18. No Access

    Article

    Parametric studies of the optogalvanic effect in a low pressure CO2 cell

    We have investigated the optogalvanic effect (OGE) in the external cavity OG cell as a function of CO2 gas pressure, discharge current and chop** frequency. Usefulness of these investigations with regards to op...

    Vas Dev, D. J. Biswas, U. K. Chatterjee in Applied Physics B (1990)

  19. No Access

    Article

    Experimental study of laser induced decomposition based processing of a brittle plastic, CR-39 (allyl diglycol carbonate)

    A cw CO2 laser, coupled with an astigmatism free beam focussing mirrors arrangement is used for processing a brittle plastic, CR-39 without producing cracks, vents or chips. The processing is based on the formati...

    L. M. Kukreja, D. D. Bhawalkar, U. K. Chatterjee, B. L. Gupta in Applied Physics A (1985)

  20. No Access

    Article

    Theoretical analysis of the multi-rotational line TEA CO2 laser

    A theoretical model for the multiline TEA CO2 laser has been developed which takes into account the overlap of the P(20) line of (0001) → (1000) regular band transition with the R(23) line of (0111) → (1110) hot ...

    A. K. Nath, U. K. Chatterjee, D. D. Bhawalkar in Optical and Quantum Electronics (1980)

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