Temperature and orientation dependence of the yield stress in Ni{in3}Ga single crystals

Takeuchi, Shin; Kuramoto, Eiichi

doi:10.1016/0001-6160(73)90198-3

Cited by 585 publications

(114 citation statements)

References 12 publications

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“…is anomalous yield behaviour at intermediate temperatures was caused by the strengthening mechanism of c′-precipitates in Ni-based superalloy [6,7]. Takeuchi and Kuramoto [8] and Paidar et al [9] reported that the ow stress increases with temperature due to thermally activated cross slip from the {111} primary slip plane to the {010} cross-slip plane. Figure 7 shows the creep curves of cast Haynes 282 alloy at 750°C; all curves began directly with the secondary (stationary) stage, as opposed to starting with the usual primary creep stage.…”

Section: Tensile Test Resultsmentioning

confidence: 99%

Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Kim

Park

Ahn

2018

Advances in Materials Science and Engineering

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Ni-based superalloy Haynes 282 was developed as a gas turbine material for use in the ultra-supercritical (USC) stage of nextgeneration coal-fired power plants. Temperatures in the USC stage exceed 700°C during operation. Despite the important role of Haynes 282 in increasing the performance of high-pressure turbines, as a result of its high-temperature capability, there is little information on the microstructure, deformation mechanism, or mechanical properties of the cast condition of this alloy. In this study, we compared the creep properties of Haynes 282 cast alloy with those of its wrought alloy counterpart. e tensile test results of cast and wrought Haynes 282 alloys over the temperature range 25-800°C showed that the cast product exhibited significantly lower strength and ductility compared with the wrought product at all test temperatures. A creep test performed at 750°C showed only a slight difference in the rupture life of the two products. Based on the creep test results, the deformation mechanism is discussed.

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Section: Tensile Test Resultsmentioning

confidence: 99%

Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Kim

Park

Ahn

2018

Advances in Materials Science and Engineering

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“…19) Some of them are attributed to the decrease in the degree of order with temperature, while the reason for stress anomaly in most of L1 2 alloys are ascribed to the locking of dislocations by the cross-slip motion of {111} screw segment onto {010} cube plane, i.e., Kear-Wilsdorf mechanism. [20][21][22] The present alloy was subjected to the annealing at 1173 K which is higher than the temperature range at which the positive temperature dependence of the strength appears. Therefore, the lowering of the order parameter never occurs during or prior to the high temperature testing and it can be concluded that the observed stress anomaly is not caused by the decrease of the order parameter.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Mechanical Properties of Co-Based L1<SUB>2</SUB> Intermetallic Compound Co<SUB>3</SUB>(Al,W)

2007

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Mechanical properties of L1 2 -Co 3 (Al,W) polycrystalline sample are investigated by compression testing at various temperature ranging from room temperature to 1193 K. It was found that at room temperature the 0.2% flow stress is 410 MPa and the compressive ductility is higher than 10%, whereas at 1193 K the 0.2% flow stress is 382 MPa and the compressive ductility is about 10%. Two candidates for the reaction scheme of the Co-rich region of the Co-Al-W ternary phase diagram are proposed by combining the results of microstructure observation, X-ray diffractometry and the previous report.

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“…% precipitates, thereby deducing that the solvus had to be less vertical than in the Pt-Al binary system. At elevated temperatures, L1 2 -Pt 3 Al does not show an anomalous increase of the flow strength with increasing temperature as exhibited by L1 2 -Ni 3 Al (Takeuchi & Kuramoto, 1973), although Pt 3 Al should be stronger than Ni 3 Al at any temperature . In the Ni-Al system, Ni 3 Al has only one structure, whereas the Pt 3 Al phase has at least two (McAlister & Kahan, 1986) if not three (Oya et al, 1987) forms.…”

Section: Phases and Microstructure Of Platinum-based Alloysmentioning

confidence: 79%