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Showing 1 to 20 of 46 for “"Iron-Nickel"”.
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Magnetic resonance in amorphous iron-nickel alloys
An ESR study on amorphous FexNi80-xP20 alloys was performed at 1.1 Ghz and 9.3 GHz, where x=8, 10, and 16. Fe8Ni72P20 and Fe10Ni70P20 show paramagnetic to spin-glass transitions, while Fe16N~4P20 shows paramagnetic to ferromagnetic and ferromagnetic to spin-glass transitions. The lineshape, at both …
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Percolation phenomena in amorphous iron-nickel alloys
… series of amorphous alloys (FepNi1_p)80P20. The iron-rich alloys are shown to be good ferromagnets, with the expected ferromagnetic critical behavior. Nickel, however, serves as a paramagnetic diluent. The amorphous structure permits the production of alloys that span the entire concentration …
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Activation volumes of carbon diffusion in F.C.C. iron-nickel alloys
… volume of carbon diffusion, ΔV, in six fcc iron-nickel alloys. Measurements were made at temperatures ranging from 68ºC to 90ºC and pressures up to six kilobars on samples having a nickel content between 31 and 63 at. %. A maximum activation volume of 3.9 cm³/mole was found at 34 at. % …
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Microstructure and Hydrogen Induced Failure Mechanisms in Iron-Nickel Weldments
A recent series of inexplicable catastrophic failures of specific subsea dissimilar metal Fe-Ni butter welds has illuminated a fundamental lack of understanding of both the microstructure created along the fusion line as well as its impact on the hydrogen susceptibility of these interfaces. In …
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The structure and mechanical properties of iron-nickel-carbon martensites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1958.
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Isothermal nucleation of martensite in an iron-nickel-manganese alloy
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1964.
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Nucleation of the isothermal martensitic transformation in iron-nickel-manganese alloys
… temperature and austenitic grain size in three iron-nickel manganese alloys containing 23-25 percent nickel, 2-3 percent manganese and 0.02-0.04 percent carbon. The isothermal martensitic transformation in these alloys has been found to occur over a wide temperature range of at least -1960 to …
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The Effect of Aluminum on The Saturation Moment of Iron - Nickel Alloys
Made available in DSpace on 2014-12-10T17:57:46Z (GMT). No. of bitstreams: 1 6706550.pdf: 2140060 bytes, checksum: 6b78d87685a1881aa42757e0e5bea90e (MD5) Previous issue date: 1966
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Iron-Nickel-Sulfur-Carbon System Under High Pressure, With Implications To Earth’S Mantle
Fe-Ni-S-C phases are accessory phases in the Earth’s mantle, but carry important geochemical and geophysical implications. According to their chemical behavior, Fe-Ni-S-C phases preferentially store siderophile and chalcophile elements (and potentially noble gases). Physically, Fe-Ni-S-C phases …
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The Crystallography and Growth of Partially-Twinned Martensite Plates in Iron - Nickel Alloys
Made available in DSpace on 2014-12-10T17:57:43Z (GMT). No. of bitstreams: 1 6511850.pdf: 4161463 bytes, checksum: dfcf1eb07f225e219c75a1ca4a0b9e94 (MD5) Previous issue date: 1965
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Relationships between homogeneity, structure and mechanical properties in certain sintered iron, nickel, carbon materials.
… classes of sintered material, each containing 3% nickel and 0.337% 0.03% carbon but with different initial degrees of homogeneity. This was achieved by the use of blended elemental powders, a nickel-plated iron powder produced in a specially developed apparatus and a prealloyed powder. Electron …
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Behavior of the iron-nickel-manganese-copper consumable system for welding ductile iron, The
Includes bibliographical references.
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Metal oxide supported iron-nickel nano-alloys in the reverse water-gas shift reaction
… are required for large-scale applications. Iron-based catalysts have been widely explored due to their high stability, while nickel catalysts are rarely considered for the RWGS due to their known hydrogenation activity. Metal oxide (MOx) catalysts, such as ceria, have also been studied for …
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Strengthening of martensite by prior deformation of the austenite in a low-carbon iron-nickel alloy
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1963.
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Oxidative dehydrogenation of ethane with carbon dioxide over iron-nickel nano-alloys supported on metal oxide overlayers
… behaviour as over GaOx@Al2O3 while higher iron contents resulted in an inactive catalyst. Over SmOx@Al2O3 no alloy composition yields appreciable catalytic activity. The CO2-ODHE/DD behaviour of Fe3Ni1/GaOx@Al2O3 is in stark contrast to the high DRE activity over Fe3Ni1/CrOx@Al2O3 …
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Structures and properties of lath martensite in rapidly solidified and conventionally processed iron-nickel-manganese-(titanium) maraging alloys
The microstructural changes, precipitation reactions and the mechanical properties of rapidly solidified and conventionally processed Fe-Ni-Mn-(Ti) martensitic alloys aged at 400-550$\sp\circ$C up to 600 hrs have been studied. Upon aging from 400 to 550$\sp\circ$C, the alloys showed classical …
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I. Crystallization, Phase Structures, and Properties of Wax - Polyethylene Systems. Ii. Some Electron Diffraction Studies of Iron - Nickel Alloys
Made available in DSpace on 2014-12-05T19:36:42Z (GMT). No. of bitstreams: 1 0023396.pdf: 9210462 bytes, checksum: 199efe827d5284b04b0bb7ca783e05ad (MD5) Previous issue date: 1957
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Iron-Based Alloys as Catalysts for CO2 Hydrogenation
… study looked at the performance of a range of iron-based bimetallic catalysts in promoting CO2 hydrogenation. Specifically, iron-nickel, iron-cobalt and iron-copper supported on βsilicon carbide were studied. It had been reported that these materials were more active and selective towards long …
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A study of the transformation behaviour and mechanical properties of iron-manganese alloys.
… properties of a series of very low carbon iron manganese alloys within the range 0 to 10% manganese. Alloys containing between 4 and 10% manganese were found to undergo a martensitic transformation which was identical to the lath or massive martensite reaction found in other iron alloys. A …
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Study of nickel-plated iron powder for powder metallurgical applications.
The use of coated iron-nickel powders in the production of sintered components of low-alloy steels has certain advantages over blended mixtures of the elemental powders. In particular, the former produce a more homogeneous material after a specific sintering treatment.There is a limited amount of …
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