Semi-solid deformation in multi-component nickel aluminide View Full Text


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Article Info

DATE

1993-07

AUTHORS

C. S. Lin, J. A. Sekhar

ABSTRACT

A systematic study was carried out to determine the solidification and tensile behaviour of semi-solid multi-component nickel aluminide. Controlled equiaxed-solidified samples were tested at various temperatures in the mushy (semi-solid) region. A special Gleeble testing procedure was developed where the samples were quickly raised to a predetermined temperature in the semi-solid zone and fractured. The fracture stress was noted to decrease monotonically with temperature. The strain to fracture exhibited a ductility minimum at an intermediate temperature in the semi-solid zone. For the equiaxed-solidified samples, the fracture stress was found to decrease with increasing cooling rate at any given temperature. At the temperature corresponding to the strain minimum, residual microcracks were detected on the fracture surface. The upper hot-tearing temperature was found to be a function of the solidification variables. The amount of strain accommodation and the hot tearing resistance was found to be a function of solidification microstructure. A fracture map, which is the fracture stress, temperature and cooling rate (σf-T-T) diagram for the equiaxed microstructures, is presented and a castability map is created from the fracture data. More... »

PAGES

3581-3588

References to SciGraph publications

  • 1984-01. Compression of semi-solid dendritic Sn-Pb alloys at low strain rates in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1982-10. Effect of Strain Rate on Deformation Behavior of Semi-Solid Dendritic Alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1980-11. Strengthening of wrought aluminum alloys by fractional melting in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1977-09. Die thermal behavior in machine casting of partially solid high temperature alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1979-06. Formation of longitudinal, midface cracks in continuously-cast slabs in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1991-02. The relationship between carbon content, microstructure, and intergranular liquation cracking in cast nickel alloy 718 in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1991-01. Solidification microporosity in directionally solidified multicomponent nickel aluminide in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1993-01-01. Semi-solid deformation in multi-component nickel aluminide in JOURNAL OF MATERIALS SCIENCE
  • 1979-03. Refining by fractional solidification in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1989-12. Solidification of the nickel-base superalloy 718: A phase diagram approach in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1981-03. Modeling of continuous strip production by rheocasting in METALLURGICAL AND MATERIALS TRANSACTIONS B
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    http://scigraph.springernature.com/pub.10.1007/bf01159840

    DOI

    http://dx.doi.org/10.1007/bf01159840

    DIMENSIONS

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