Effect of Ta addition on microstructure and mechanical properties of dual two-phase Ni3Al-Ni3V intermetallic alloy–Retraction

ABSTRACTMechanism for the hardening of two-phase Ni3Al-Ni3V intermetallic alloy to which 2 at.% Ta was added in different substitution manners for Ni, Al and V was presented, based on the microstructural observation, alloying behavior and lattice properties of the additive in the constituent phases. The hardening behavior was explained in terms of solid solution hardening in which the mixture rule in the volume fraction of the two constituent phases and the atomic size misfit evaluated from the changes of the lattice parameters were incorporated. Consequently, the hardening for the alloys in which the additives were substituted for Ni and V was attributed to solid solution hardening. On the other hand, the hardening for the alloy in which the additive was substituted for Al was attributed to the hardening due to microstructural refining in addition to the solid solution hardening.

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Saturated solid-solution hardening behavior of Ir–Hf–Nb refractory superalloys for ultra-high temperature applications

Scripta Materialia ◽

10.1016/j.scriptamat.2005.08.038 ◽

2006 ◽

Vol 54 (1) ◽

pp. 115-119 ◽

Cited By ~ 13

Author(s):

J.B. Sha ◽

Y. Yamabe-Mitarai

Keyword(s):

Solid Solution ◽

High Temperature ◽

Solid Solution Hardening ◽

Solution Hardening ◽

Hardening Behavior ◽

Ultra High Temperature ◽

Temperature Applications

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Impact of short range ordering on the anomalous four-stage strain hardening behavior of low solid-solution hardening Ni–Cr alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141193 ◽

2021 ◽

Vol 814 ◽

pp. 141193

Author(s):

Y.J. Zhang ◽

D. Han ◽

X.W. Li

Keyword(s):

Solid Solution ◽

Strain Hardening ◽

Short Range ◽

Solid Solution Hardening ◽

Solution Hardening ◽

Hardening Behavior ◽

Short Range Ordering ◽

Strain Hardening Behavior

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Rapid assessment of solid solution hardening via atomic size misfit parameter in refractory concentrated alloys

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.161320 ◽

2021 ◽

pp. 161320

Author(s):

Il Hwan Kim ◽

Hyun Seok Oh ◽

Sang Jun Kim ◽

Eun Soo Park

Keyword(s):

Solid Solution ◽

Rapid Assessment ◽

Solid Solution Hardening ◽

Solution Hardening ◽

Atomic Size ◽

Misfit Parameter

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The combination of atomic size and elastic modulus misfit interactions in solid solution hardening

Scripta Metallurgica ◽

10.1016/0036-9748(81)90257-x ◽

1981 ◽

Vol 15 (8) ◽

pp. 815-820 ◽

Cited By ~ 39

Author(s):

L.A. Gypen ◽

A. Deruyttere

Keyword(s):

Solid Solution ◽

Elastic Modulus ◽

Solid Solution Hardening ◽

Solution Hardening ◽

Atomic Size

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Alloying Effect of Ta on Microstructure and Mechanical Properties of Ni3(Si,Ti) Intermetallic Alloy

MRS Proceedings ◽

10.1557/opl.2011.247 ◽

2011 ◽

Vol 1295 ◽

Cited By ~ 1

Author(s):

Daiki Imajo ◽

Yasuyuki Kaneno ◽

Takayuki Takasugi

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

Single Phase ◽

Tensile Elongation ◽

Solid Solution Hardening ◽

Refractory Element ◽

Positive Temperature ◽

Solution Hardening ◽

Two Phase ◽

High Level

ABSTRACTThe refractory element Ta was added to L12-type Ni3(Si,Ti) intermetallic alloys in order to substitute for Ti. The microstructure and the mechanical properties of the alloys were investigated as a function of the Ta content. All the alloys were doped with 50 wt.ppm boron to suppress intergranular fracture. The alloys containing up to 5 at.% Ta showed an L12 single-phase microstructure, while the alloys containing more than 5 at.% Ta exhibited a two-phase microstructure consisting of Ni3Ta particles in the L12 matrix. At room-temperature (RT), the hardness of the alloys with the L12 single-phase microstructure increased with increasing Ta content due to solid solution hardening of Ta. RT yield stress (0.2% yield strength) and tensile ultimate strength of the alloys with the L12 single-phase microstructure increased with increasing Ta content keeping a high level of tensile elongation. At high-temperature (HT), the positive temperature dependence of hardness was observed in all the alloys, irrespective of Ta addition. HT hardness was also enhanced by the addition of Ta. It was consequently demonstrated that Ta is a remarkable solid solution hardening element in the Ni3(Si,Ti) alloys.

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A Tem Study of Slip Systems in MoSi2/WSi2 Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100089020 ◽

1991 ◽

Vol 49 ◽

pp. 942-943

Author(s):

Stuart A. Maloy

Keyword(s):

Solid Solution ◽

Solid Solution Hardening ◽

Slip Systems ◽

High Melting ◽

Group 14 ◽

Solution Hardening ◽

Brittle To Ductile Transition ◽

High Melting Temperature ◽

Tetragonal Unit Cell ◽

Structural Applications

MoSi2 has recently been investigated as a potential material for high temperature structural applications. It has excellent oxidation resistance up to 1700°C, a high melting temperature, 2030°C, and a brittle-to-ductile transition temperature at 900-1000°C. WSi2 is isomorphous with MoSi2 and has a body-centered tetragonal unit cell of the space group 14/mmm. The lattice parameters are a=3.20 Å and c=7.84 Å for MoSi2 and a=3.21 Å and c=7.88 Å for WSi2. Therefore, WSi2 was added to MoSi2 to improve its strength via solid solution hardening. The purpose of this study was to investigate the slip systems in polycrystalline MoSi2/WSi2 alloys.

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