Plastic behaviour in Ni3(Al,X) single crystal - Temperature, strain-rate, Orientation and composition.

Suzuki, Tomoo; Mishima, Yoshinao; Miura, Seiji

doi:10.2355/isijinternational.29.1

Cited by 118 publications

(41 citation statements)

References 2 publications

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“…2.1(b) was found to exist with the CSF being spread in either the (111) or the (111) plane with essentially equal energy, the importance -whicli will be shown later. As the CSF energy was increased to the point of instability of this fault, each superlattice partial dislocation was found to be dissociated in (111) and (I11) simultaneously.…”

Section: Deformation Of LI 2 Superlattice Structuresmentioning

confidence: 99%

“…over) (111). aJ/2[101 edge segment on (010) at A may be periodically inhibited from gliding at same rate as edge segment on (111). When this occurs, a macrokink is formed on the Kear-Wilsdorf line.…”

Section: Abstract (Continue On Reverse If Necessary and Identify By Bmentioning

confidence: 99%

“…The dislocation structure has been characterized after deformation at low temperatures. over) (111). aJ/2[101 edge segment on (010) at A may be periodically inhibited from gliding at same rate as edge segment on (111).…”

Section: Abstract (Continue On Reverse If Necessary and Identify By Bmentioning

confidence: 99%

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Strengthening by Substitutional Solutes and the Temperature Dependence of the Flow Stress in Ni3Al

Dimiduk¹

1989

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Section: Deformation Of LI 2 Superlattice Structuresmentioning

confidence: 99%

Section: Abstract (Continue On Reverse If Necessary and Identify By Bmentioning

confidence: 99%

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Strengthening by Substitutional Solutes and the Temperature Dependence of the Flow Stress in Ni3Al

Dimiduk¹

1989

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“…1) Among various L1 2 compounds, Ni 3 Al has been intensively investigated because the compound is the most important strengthening phase for the Ni-based superalloys. 2,3) Co-based L1 2 compounds such as Co 3 Ti and (Co,Fe) 3 V have also been studied [4][5][6] but these have not been utilized as constituent phases for commercial Co-based heat-resisting alloys because of their low phase stability, i.e., low melting point, significant decrease of the volume fraction with temperature, or low order-disorder transition temperature. However, these Co-based L1 2 compounds composed of transition metal elements have relatively good ductility even without microalloying of B, which is required to ductilize Ni 3 Al and Ni 3 (Si,Ti).…”

Section: Introductionmentioning

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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“…1) Further, among various L12 compounds, Ni3Al has been investigated extensively because it is the most important strengthening phase of Ni-based superalloys. 2,3) Recently, a new Co-based L12 compound Co3(Al,W) was found by Sato et al 4) Co-based two-phase alloys composed of a facecentered cubic Co matrix and the compound as precipitates show good high temperature properties. 4,5) The mechanical properties of materials, such as yield stress and temperature dependence, are their primary characteristics and are the governing factors for their practical applicability.…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion in Co-Based Co–Al–W Ternary Alloys at Elevated Temperatures

2014

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L12-type Co3(Al,W) compound is a very important phase in Co-based high temperature materials. This study investigated the interdiffusions of Co-based Co-Al-W ternary alloys at 1 423, 1 473 and 1 523 K. Two types of diffusion couples were employed to estimate four diffusivity matrix coefficients ( , , and ). A modified ternary Boltzmann-Matano method was employed for the evaluation of interdiffusion coefficients. The estimated cross-interdiffusion coefficients ( and ) had opposite signs at 1 523 K which is not contradictory to but rather consistent with the Onsager's reciprocity theorem. The second derivative of the Gibbs free energy with respect to the Al concentration, ( ), may have a sign opposite to that of W concentration, (). Experimental results revealed that the effect of W on the Al diffusion flux is greater than that of Al on the diffusion flux of W by about one order of magnitude.KEY WORDS: interdiffusion coefficient; Co-based alloy; ternary alloy; Onsager's reciprocity theorem; Gibbs free energy.

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Plastic behaviour in Ni3(Al,X) single crystal - Temperature, strain-rate, Orientation and composition.

Cited by 118 publications

References 2 publications

Strengthening by Substitutional Solutes and the Temperature Dependence of the Flow Stress in Ni3Al

Strengthening by Substitutional Solutes and the Temperature Dependence of the Flow Stress in Ni3Al

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

Interdiffusion in Co-Based Co–Al–W Ternary Alloys at Elevated Temperatures

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