Some details of dislocation structure of ordered alloys with small domains

Попов, Л. Е.; Конева, Н. А.; Perov, G. A.; Esipenko, V. F.; Teplyakova, L. A.

doi:10.1002/pssa.2210230245

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…The appearance and movement of single dislocations in L1 2 superstructure such as Ni 3 Fe subjected to small deformations has been reported as an indication of destruction of short range order . Elsewhere, in situ straining experiments of short range ordered superalloys have been conducted on material containing 66% Ni and 26% Cr with domain size of about 0.7 nm.…”

Section: Discussionmentioning

confidence: 99%

“…[14] The appearance and movement of single dislocations in L1 2 superstructure such as Ni 3 Fe subjected to small deformations has been reported as an indication of destruction of short range order. [15] Elsewhere, in situ straining experiments of short range ordered superalloys have been conducted on material containing 66% Ni and 26% Cr with domain size of about 0.7 nm. Transmission electron microscope (TEM) observations at applied strain levels of about 500 μE revealed the destruction of short range order by movement of the first dislocation pair.…”

Section: Figure 22mentioning

confidence: 99%

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The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages

Kieffer

Peters

2017

Strain

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The ability of alloy 70Ni-27.5Fe-2.5Cr to form an ordered crystalline structure upon application of elevated temperature and the resulting effects on a variety of physical properties such as magnetism, strength, electrical resistance, and specific heat are well known. This paper demonstrates that strain gages made with 70Ni-27.5Fe-2.5Cr foil with an ordered crystalline structure have both high gage factors and high thermal outputs. The thermal output for strain gages made of 70Ni-27.5Fe-2.5Cr foil is demonstrated to be about 1,374 μΩ/Ω/K. The gage factor is nonlinear ranging in magnitude from about 5.0 to 3.6 for applied strains of 300 and 1,300 μE, respectively. The magnitude of gage factor and thermal output correspond with transformation of the crystalline structure from a state of disorder to a state of order. Comparisons to strain gages made with 36Ni-57Fe-7Cr foil are provided because of its use in the manufacturing of metal foil strain gages and their demonstrated high gage factors and high thermal outputs. Practical application for 70Ni-27.5Fe-2.5Cr strain gages is demonstrated by dead-weight loading of shear-beam load cells at low applied strain levels to minimise the effect of nonlinear gage factor; and Wheatstone bridge cancellation of high thermal output. KEYWORDS gage factor, metal foil strain gages, Ni 3 FeCr, short range order, thermal output | INTRODUCTIONCrystalline order in Ni 3 Fe binary and several Ni 3 Fe ternary alloys has been reported extensively in the literature, primarily on two types of topics: the effect of crystalline order on material property; and the method by which crystalline order is detected. Material properties have included hardness and work hardening, [1] elastic constants and strength, [2] thermal conductivity, electrical resistivity and Seebeck coefficient, [3] specific heat, [4] and magnetic permeability.[5] The material property may actually be quite sensitive to crystalline order as reported by Binnatov et al. [4] where specific heat appeared to be more sensitive than Mossbauer spectroscopy in detecting crystalline order. Regarding the specific strain gage properties of thermal output and gage factor in Ni 3 Fe ternary alloys, no prior research relating these to crystalline order was found. Detection of crystalline order has typically been by indirect measurement, most notably electrical resistivity. As such, the bonded electrical resistance strain gage may be ideally suited for detection of crystalline order since thermal output and gage factor involve change in electrical resistivity with the former being from change in temperature and the latter being from change in applied strain.

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Section: Discussionmentioning

confidence: 99%

Section: Figure 22mentioning

confidence: 99%

The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages

Kieffer

Peters

2017

Strain

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“…However, the superdislocation structure changes with strain, namely, their splitting (r) increases with strain so that in stage III of the strain curve and in some cases even at lower degrees of plastic strain, single dislocations and sometimes their pile-ups are detected [2,[3][4][5][6]. An increase in the superdislocation splitting upon plastic strain of the ordered alloys with the L1 2 superlattice is caused by accumulation of antiphase boundaries (APB) [7] in active slip planes, which is equivalent to a decrease in the effective APB energy ζ* binding superpartial dislocations into a superdislocation.…”

Section: Introductionmentioning

confidence: 99%

Change of superdislocation splitting with strain in single crystals of the Ni3Fe ordered alloy

et al. 2006

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The method of transmission electron microscopy is used to study the dislocation structure in single crystals of the Ni 3 Fe ordered alloy for different degrees of strain. The [1812], [011], [111] and [001] single crystal orientations are examined. The superdislocation splitting (r) is measured for different degrees of strain, distributions of r are constructed, and their average values are estimated. The -ε curves are constructed. With the use of the experimental r values, the effective energy of antiphase boundaries ζ* is estimated.

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Strain hardening and characteristics of the dislocation structure of the alloy Ni3Mn with a different order state

Конева¹,

Perov²,

Попов³

et al. 1982

Soviet Physics Journal

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Some details of dislocation structure of ordered alloys with small domains

Cited by 7 publications

References 6 publications

The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages

The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages

Change of superdislocation splitting with strain in single crystals of the Ni3Fe ordered alloy

Strain hardening and characteristics of the dislocation structure of the alloy Ni3Mn with a different order state

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Some details of dislocation structure of ordered alloys with small domains

Cited by 7 publications

References 6 publications

The effect of short range order on the thermal output and gage factor of Ni3FeCr strain gages

The effect of short range order on the thermal output and gage factor of Ni3FeCr strain gages

Change of superdislocation splitting with strain in single crystals of the Ni3Fe ordered alloy

Strain hardening and characteristics of the dislocation structure of the alloy Ni3Mn with a different order state

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The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages

The effect of short range order on the thermal output and gage factor of Ni₃FeCr strain gages