Browsing by Author "Agrawal, B.K."

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Comparative study of spinodal decomposition in symmetric and asymmetric Cu-Ni-Cr alloys
(1991) Rao, P.P.; Agrawal, B.K.; Rao, A.M.
Spinodal decomposition in three alloys of nominal compositions 71Cu-27Ni-2Cr, 45Cu-45Ni-10Cr and 33Cu-52Ni-15Cr were studied by X-ray diffraction technique and transmission electron microscopy. It was found that the first and third alloys are asymmetric in nature while the second is symmetric. The symmetric alloy was found to decompose faster than the asymmetric ones. The asymmetry of the side bands was found to be related to the proportion of phases in the alloy. Electron microscopic studies revealed that during coarsening the major phase increases its connectivity by isolating the minor phase. 1991 Chapman and Hall Ltd.
Hardening mechanism in spinodal CuNiCr alloys
(1987) Prasad, Rao, P.; Agrawal, B.K.; Rao, A.M.
Spinodal decomposition in two CuNiCr alloys has been investigated. The variations in strain amplitude, wavelength of composition modulation and yield stress increment were studied with aging time. It was found that the variation in yield stress increment with aging time followed monotonically the variations in strain amplitude and wavelength of composition modulation. It was concluded that theories which relate amplitude to yeild stress best explain the strengthening mechanism. Experimental values were found to correlate well with the theory of Kato, Mori and Schwartz. 1987.
Spinodal decomposition in three alloys of nominal compositions 71Cu-27Ni-2Cr, 45Cu-45Ni-10Cr and 33Cu-52Ni-15Cr were studied by X-ray diffraction technique and transmission electron microscopy. It was found that the first and third alloys are asymmetric in nature while the second is symmetric. The symmetric alloy was found to decompose faster than the asymmetric ones. The asymmetry of the side bands was found to be related to the proportion of phases in the alloy. Electron microscopic studies revealed that during coarsening the major phase increases its connectivity by isolating the minor phase. © 1991 Chapman and Hall Ltd.
(Kluwer Academic Publishers, Comparative study of spinodal decomposition in symmetric and asymmetric Cu-Ni-Cr alloys) Prasad Rao, P.; Agrawal, B.K.; Rao, A.M.
1991
Spinodal decomposition in two CuNiCr alloys has been investigated. The variations in strain amplitude, wavelength of composition modulation and yield stress increment were studied with aging time. It was found that the variation in yield stress increment with aging time followed monotonically the variations in strain amplitude and wavelength of composition modulation. It was concluded that theories which relate amplitude to yeild stress best explain the strengthening mechanism. Experimental values were found to correlate well with the theory of Kato, Mori and Schwartz. © 1987.
(Hardening mechanism in spinodal CuNiCr alloys) Prasad Rao, P.; Agrawal, B.K.; Rao, A.M.
1987
Studies on spinodal decomposition in Cu-27Ni-2Cr alloy
(1986) Rao, P.P.; Agrawal, B.K.; Rao, A.M.
Transformation characteristics of a Cu-27Ni-2Cr alloy were studied on ageing in the temperature range of 773 to 1073 K, by means of X-ray diffraction and transmission electron microscopy. It was concluded from morphological features that the alloy undergoes spinodal decomposition and the coherent spinodal was estimated to be 946 K. Yield stress increment on ageing was found to follow monotonically the strain amplitude and to be independent of the wavelength of composition modulation. 1986 Chapman and Hall Ltd.
Transformation characteristics of a Cu-27Ni-2Cr alloy were studied on ageing in the temperature range of 773 to 1073 K, by means of X-ray diffraction and transmission electron microscopy. It was concluded from morphological features that the alloy undergoes spinodal decomposition and the coherent spinodal was estimated to be 946 K. Yield stress increment on ageing was found to follow monotonically the strain amplitude and to be independent of the wavelength of composition modulation. © 1986 Chapman and Hall Ltd.
(Kluwer Academic Publishers, Studies on spinodal decomposition in Cu-27Ni-2Cr alloy) Prasad Rao, P.; Agrawal, B.K.; Rao, A.M.
1986