Effect of growth rate on elevated temperature plastic flow androom temperature fracture toughness of directionally solidified NiAl-31Cr-3Mo

Whittenberger, J. D.; Raj, S. V.; Locci, Ivan E.; Salem, Jonathan A.

doi:10.1016/s0966-9795(99)00023-0

Cited by 40 publications

(25 citation statements)

References 15 publications

(4 reference statements)

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“…Overall the microstructures of the present Ni-33Al-33Cr-lMo rods as a function ofDS rate are similar to those found in Ni-33AI-31Cr-3Mo [4,7] as a function of growth rate. The structure in Fig.…”

Section: Resultssupporting

confidence: 76%

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1300 K Compressive Properties of Directionally Solidified Ni-33Al-33Cr-1Mo

2000

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The Ni-33AI-33Cr-1Mo eutectic has been directionally solidify by a modified Bridgeman technique at growth rates ranging from 7.6 to 508 mm/h to produce grain/cellular microstructures containing alternating plates ofNiAl and Cr alloyed with Mo. The grains had sharp boundaries for slower growth rates (~ 12.7 mm/h) , while faster growth rates (;::: 25.4 mm/h) lead to cells bounded by intercellular regions. Compressive testing at 1300 K indicated that alloys DS' ed at rates between 25.4 to 254 rnmlh possessed the best strengths which exceed that for the as-cast alloy.

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Section: Resultssupporting

confidence: 76%

“…Directional solidification (DS) ofNiAl-X systems has shown promise for the simultaneous improvement of elevated temperature strength and room temperature toughness [1][2][3][4]. In general it was believed that these benefits could only be possible when the structure was perfectly aligned and fault free.…”

Section: Introductionmentioning

confidence: 99%

1300 K Compressive Properties of Directionally Solidified Ni-33Al-33Cr-1Mo

2000

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“…It shouldbe notedthat the elevatedtemperature strengthandroom temperaturefracture toughnessof alloys grown with cellularmicrostructures are comparable, if not slightly better, thanthosewith a planareutecticmicrostructure [15]. Figure 10 clearly indicatesthat cells and platescan form over a wide rangeof growthratesandthereis a significantprocessingwindow for obtaining these microstructures.However, Fig.…”

Section: Re-evaluation Of the Microstructure Map For Niai/(cr Mo) Eumentioning

confidence: 92%

Microstructural characterization of a directionally-solidified Ni–33 (at.%) Al–31Cr–3Mo eutectic alloy as a function of withdrawal rate

Raj

Locci

2001

Intermetallics

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“…Advanced NiAl-based high temperature materials for structural applications in energy conversion systems are currently under development [1][2][3][4][5][6][7]. The high melting point intermetallic compound NiAl with B2 superlattice structure exhibits superior physical and mechanical properties and excellent oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%