Rate Sensitivities for Low Temperature Deformation in Ruthenium Aluminide Alloys

Eow, K.; Lu, Damin; Pollock, Tresa M.

doi:10.1016/s1359-6462(98)00015-3

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…It is desirable to have k111l primary slip, which results in five independent slip systems required for low temperature ductility. However, ductility also requires high dislocation mobility, which may be indirectly studied with strain-rate jump tests [27,28]. The values of strain rate sensitivity at room temperature in the Ru32Al13Ta alloy are low compared to NiAl, and are similar to RuAl alloys [14] and FeAl [28], most likely indicating a relatively higher dislocation mobility.…”

Section: Discussionmentioning

confidence: 99%

Deformation of Ru–Al–Ta ternary alloys

et al. 2004

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Section: Discussionmentioning

confidence: 99%

Deformation of Ru–Al–Ta ternary alloys

et al. 2004

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“…[27] In B2 AlRu, B additions have little effect on strength or ductility. [28] No B2 compound has been observed to show the great improvement in ductility seen in some of the L1 2 materials.…”

Section: Intermetallics With Third Element Additionsmentioning

confidence: 99%

Ductility in Intermetallic Compounds

Russell¹

2003

Adv Eng Mater

115

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Intermetallic compounds are comprised of two or more metallic elements, but unlike ordinary metals, they have bonding that is part metallic, part covalent, and part ionic. Because of their mixed bonding, they are often lighter, stronger, stiffer, and more corrosion‐resistant than ordinary metals, particularly at high temperatures. Yet their uses are limited because they are usually brittle at room temperature (RT), making them difficult to fabricate and vulnerable to fracture. These materials hold great promise to improve efficiency in the transportation, electric power generation, and chemical process industries; however, persistent problems with low ductility and poor fracture toughness have severely limited their use in engineering systems. This article presents an overview of the progress in improving the RT ductility and fracture toughness of intermetallic compounds and describes prospects for their near‐term engineering use.

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“…The strain-rate sensitivity of the flow stress (m 0 ) of various RuAl alloys, determined at 77 K and RT, was also reported to be low (m 0 ¼ 0.0040 O 0.0097) [12,16]. The low strain-rate sensitivity (m 0 ) of the polycrystalline RuAl alloys is in good agreement with the reports on the high stress exponent (m) of RuAl single crystals because m represents the reciprocal value of m 0 (217 ¼ 1/0.0046) [18].…”

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 96%

“…The temperature sensitivity of the flow stress was determined to be relatively low between 77 K and RT for stoichiometric RuAl and several other RuAl alloys [12,16,17]. The strain-rate sensitivity of the flow stress (m 0 ) of various RuAl alloys, determined at 77 K and RT, was also reported to be low (m 0 ¼ 0.0040 O 0.0097) [12,16].…”

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

“…The effects of different alloying additions such as B [6,7,12,16,22,35,37,38], C [39], Fe [8,37,40], Co [8,37,40,41], Ni [9e11,41e47], Ti [8,37,40,41], Nb [36], Ta [14], Cr [12,29,37], Si [29,37], Y [12,29], Sc [6,7,16,22,29,37,48,49], Re [29], Ce [29], Pt [35,36,39], Ir [38,39,42,50e52], and Pd [39] were studied with emphasis on strengthening (solid solution strengthening and work hardening) and ductilization. Excluding B and C, ternary alloying generally results in strength increase, accompanied by a decrease of ductility and toughness.…”

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

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