Physikalische Eigenschaften

Fahlenbrach, Hermann; Jellinghaus, Werner; Lücke, K.; Mager, A.; Olshausen, K. D.; Pfeifer, Frank; Thomas, Hans; Volk, K. E.; Westphal, H.

doi:10.1007/978-3-662-12596-0_2

Cited by 2 publications

(2 citation statements)

References 169 publications

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“…Prior to these experiments, test runs were made with a nickel standard [9] by means of which suitable corrections were made for machine deformation. Trial runs made on the standard indicated that the error in the measurement of expansion coefficient values was about + 3%.…”

Section: Methodsmentioning

confidence: 99%

Thermal evidence for the structural instability in Ni3Al alloys

Ramesh¹,

Pathiraj²,

Kolster³

et al. 1992

High Temperature Aluminides and Intermetallics

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The thermal expansion coefficient (a) and calorimetric data were obtained as a function of temperature in order to clarify some of the significant variations reported with regard to these values in the literature. Stoichiometric and off-stoichiometric compositions of Ni3Al alloys (with and without boron addition) were investigated. Dilatometric experiments were performed on all the alloys and the a values were estimated over the temperature range from ambient to 1000 °C. Two runs were made on each sample under different initial conditions and differences in a values were noticed. The results were analysed based on our earlier X-ray diffraction results. Additional isothermal dilatometric tests were also carried out and a significant volume change was noticed (0.45% contraction) when the alloy quenched from 1000 °C was heated to 600 °C and held for a long duration. The calorimetric data were obtained over the same range of temperature and enthalpy changes, though less distinct, were noticed at around 360, 660 and 900 °C. The variations seen further augment our earlier results on the instability of the L12 structure and the existence of a structural transformation.

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal evidence for the structural instability in Ni3Al alloys

Ramesh¹,

Pathiraj²,

Kolster³

et al. 1992

High Temperature Aluminides and Intermetallics

View full text Add to dashboard Cite

show abstract

“…where the symbols have the usual significance. Prior to these experiments, test runs were made with a nickel standard [9] by means of which suitable corrections were made for machine deformation. Trial runs made on the standard indicated that the error in the measurement of expansion coefficient values was about + 3%.…”

Section: Methodsmentioning

confidence: 99%