Strain aging in tungsten heavy alloys

Dowding, Robert J.; Tauer, K.J.

doi:10.1016/0956-716x(91)90365-8

Cited by 10 publications

(1 citation statement)

References 7 publications

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“…Interestingly, Dowding and Tauer [17] present a summary of strengthening behavior in a series of heat-treated Ni-3Fe-90W and Ni-2.1Fe-93W alloys, and attribute measured hardness increases to strain aging that occurs within the bcc-tungsten particles during postdeformation, elevated-temperature heat treatments. Dowding and Tauer cite several other investigations, which similarly attributed an observed strain aging effect in tungsten heavy alloys to the tungsten portion, but did not specifically mention that strain aging was also possible within the matrix phase as well.…”

Section: B Mechanical Behaviormentioning

confidence: 99%

Effect of dissolved tungsten on the deformation of 70Ni-30Fe alloys

Knipling

Zeman²,

Marte

et al. 2004

Metall Mater Trans A

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A series of Ni-Fe alloys containing various levels of tungsten in solid solution have been prepared as a means to assess the influence of solid solution strengthening on the mechanical behavior of monolithic 70Ni-30Fe. In particular, 70Ni-30Fe alloys plus equilibrium concentrations of tungsten in solid solution nominally correspond to the compositions associated with the matrix-only portion of certain tungsten heavy alloys, that is, alloys comprised of a high volume fraction of nominally pure tungsten particles embedded within a minority Ni-Fe-W based matrix. The study shows that the working solubility of tungsten within the 70Ni-30Fe base composition increases slightly with temperature, from approximately 21 wt pct at room temperature to approximately 23 wt pct at 1400 °C. Increasing the level of tungsten in solid solution leads to increases in room-temperature yield strength, tensile strength, and ductility. In contrast, the deformation characteristics of the alloys, as quantified by the power-law workhardening exponent, n, and the strain-rate-sensitivity exponent, m, show little variation with tungsten solute concentration.

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Section: B Mechanical Behaviormentioning

confidence: 99%