Microstructure effects on tensile properties of tungsten-Nickel-Iron composites

Rabin, B. H.; German, Randall M.

doi:10.1007/bf02674026

Cited by 108 publications

(36 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two measures of ductility of a material under plane shock loading are magnitudes of shear stress sustained under shock compression and spall threshold under shock induced tension. The results presented in this work tends to bear out the observations of Rabin and German (1988) but not completely. The magnitude of shear stress sustained in polycrystalline W (Asay et al, 1980) and 93W when shocked to 9.7 GPa are 0.8 and 1.3 GPa, respectively (Table 8).…”

Section: Elastic Deformationsupporting

confidence: 68%

“…Additionally, the HEL of swaged or annealed 93W do not seem to differ significantly from one another ( Table 8). Rabin and German (1988) showed that increasing tungsten content in W composites results in strengthening and drastic decrease in the ductility of the alloy. Two measures of ductility of a material under plane shock loading are magnitudes of shear stress sustained under shock compression and spall threshold under shock induced tension.…”

Section: Elastic Deformationmentioning

confidence: 99%

See 1 more Smart Citation

Shock Response of a Heavy Tungsten Alloy

Dandekar¹,

Weisgerber²

2000

View full text Add to dashboard Cite

_This article describes the results of shock wave experiments performed on a heavy tungsten alloy containing W, Ni, and Fe in the ratio of 92.85:4.9:2.25 by weight. These experiments provide information about the shear strength under compression and tensile strength, as measured by the spall threshold, of this alloy to 24 GPa. The results of these experiments show that: (i) the magnitude of its Hugoniot elastic limit (HEL) is 2.76 + 0.26 GPa; (ii) this alloy deforms plastically above its HEL and thus retains its shear strength to 24 GPa; (iii) the spall strength of the alloy is found to be 1.9 ± 0.4 GPa and is independent of the impact stress and duration of the shock compression pulse; and (iv) the tensile impedance of the alloy, determined from a new experiment designed to measure this impedance, is 68 ± 10 Gg/m s. INTERNATIONAL JOURNAL OF Plasticity PERGAMON AbstractThis article describes the results of shock wave experiments performed on a heavy tungsten alloy containing W, Ni, and Fe in the ratio of 92.85:4.9:2.25 by weight. These experiments provide information about the shear strength under compression and tensile strength, as measured by the spall threshold, of this alloy to 24 GPa. The results of these experiments show that: (i) the magnitude of its Hugoniot elastic limit (HEL) is 2.76 ± 0.26 GPa; (ii) this alloy deforms plastically above its HEL and thus retains its shear strength to 24 GPa; (iii) the spall strength of the alloy is found to be 1.9 ±0.4 GPa and is independent of the impact stress and duration of the shock compression pulse; and (iv) the tensile impedance of the alloy, determined from a new experiment designed to measure this impedance, is 68 ± 10 Gg/m 2 s.

show abstract

Section: Elastic Deformationsupporting

confidence: 68%

Section: Elastic Deformationmentioning

confidence: 99%

Shock Response of a Heavy Tungsten Alloy

Dandekar¹,

Weisgerber²

2000

View full text Add to dashboard Cite

show abstract

“…Two sets of sintering conditions were investigated for each alloy. The alloy 90W-10%Ni 3 Compositional measurements in a SEM (using EDS) corresponding to different features indicated on these micrographs are listed in Tables VIII and IX respectively. Based on the compositional measurements in Table VIII, it is clear that the faceted phase in Figure 19c is a W-Ni phase.…”

Section: M1mentioning

confidence: 99%

The Development of a Tungsten Heavy Alloy That Fails by an Adiabatic Shear Mechanism. Phase 1

Guha¹,

Kyriacou²,

Withers³

et al. 1993

View full text Add to dashboard Cite

“…8,9) The other limitation of liquid-phase-sintered tungsten heavy alloys is the fast growth of tungsten grains, which resulted in the decreased contiguity of tungsten grains and decreased dissolved concentration of tungsten in the matrix phase. 10) Accordingly, elements such as Mo were added to reduce the growth rate of tungsten grains, and increase the total dissolved concentration of W and Mo in the matrix phase, which substantially increased the strength of the alloys. 11) However, a high concentration of Mo in the matrix phase was prone to cause the precipitation of intermetallic compounds along the boundaries between tungsten grains and matrix phase during cooling from the sintering temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Mechanical Properties under High Strain Rate Testing of W–3.99Ni–1.71Fe Sintered by a Two-Stage Sintering Process

Lee

Chan

2012

Mater. Trans.

View full text Add to dashboard Cite

A two-stage sintering practice was applied to W3.99Ni1.71Fe (mass%) to control its microstructural evolution and, accordingly, mechanical properties under high strain rates. Unlike the traditional one-stage liquid phase sintering, the alloy was first solid-state-sintered to close to full densification, and then liquid-phase-sintered by induction heating where the cooling rate was fast. With the two-stage sintering, the growth of tungsten grains and the contiguity of tungsten grains could be closely tailored, and a high dissolved tungsten concentration in the matrix phase could be maintained. All of these microstructural characteristics led to enhanced mechanical properties of this alloy tested under high strain rates.

show abstract

Microstructure effects on tensile properties of tungsten-Nickel-Iron composites

Cited by 108 publications

References 22 publications

Shock Response of a Heavy Tungsten Alloy

Shock Response of a Heavy Tungsten Alloy

The Development of a Tungsten Heavy Alloy That Fails by an Adiabatic Shear Mechanism. Phase 1

Microstructural Evolution and Mechanical Properties under High Strain Rate Testing of W–3.99Ni–1.71Fe Sintered by a Two-Stage Sintering Process

Contact Info

Product

Resources

About

Microstructure effects on tensile properties of tungsten-Nickel-Iron composites

Cited by 108 publications

References 22 publications

Shock Response of a Heavy Tungsten Alloy

Shock Response of a Heavy Tungsten Alloy

The Development of a Tungsten Heavy Alloy That Fails by an Adiabatic Shear Mechanism. Phase 1

Microstructural Evolution and Mechanical Properties under High Strain Rate Testing of W&ndash;3.99Ni&ndash;1.71Fe Sintered by a Two-Stage Sintering Process

Contact Info

Product

Resources

About

Microstructural Evolution and Mechanical Properties under High Strain Rate Testing of W–3.99Ni–1.71Fe Sintered by a Two-Stage Sintering Process