Formation of structural L12 compounds in TiAl3-base alloys containing Mn

Mikami, Hiroshi; Hirukawa, K.; Nakayama, Yutaka

doi:10.1016/0036-9748(89)90357-8

Cited by 114 publications

(17 citation statements)

References 11 publications

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“…The hardness of the L1, trialuminides decreases, and their cracking resistance correspondingly increases, as the ternary alloying elements decrease in atomic number from Cu to Cr, indicating that the most promising ternary additions for A13Ti-based alloys appear to be Cr and Mn. Consistent with this observation, significant ductility in compression [10], and measurable plastic strain on the tensile side of bend bars [12,75], have been reported, especially in Cr and Mn-modified L12 alloys. With regard to the cracking resistance of the Cr and Mn-modified L12 trialuminides, Nicet al [50] and Zhang et al [13] initially reported crack-free loads up to 50 kgf for indentation tests.…”

Section: Properties Of the L12 Trialuminidessupporting

confidence: 60%

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Trialuminide intermetallic alloys for elevated temperature applications—overview

Chang

Muddle

1997

Metals and Materials

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Section: Properties Of the L12 Trialuminidessupporting

confidence: 60%

“…More recently, cubic L12 phases have also been established by alloying AI~Ti with elements such as Fe [8], Mn [10,13], Cr [11,13], Co [49,50], Nb, W [51], Rh, Au and Pt [52] as shown in Fig. 3.…”

Section: Macroalloyingmentioning

confidence: 99%

Trialuminide intermetallic alloys for elevated temperature applications—overview

Chang

Muddle

1997

Metals and Materials

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“…It is reported that the plasticity of TiAl 3 is improved by the addition of other elements. 3,4) Then, due to improving toughness of TiAl 3 , TiAl 3 composite with fine Al 2 O 3 particle is fabricated by the combustion process and its microstructure and mechanical properties of the TiAl 3 /Al 2 O 3 composite are evaluated in detail.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of TiAl3/Al2O3 in situ Composite by Combustion Process

et al. 2014

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The microstructure and mechanical properties of TiAl 3 /Al 2 O 3 in situ composite by combustion process are investigated in details. Pure Al powder and TiO 2 powder were mechanically milled with a molar ratio of 13 : 3 at 300 rpm for 18 ks. This milling powder's green compact coldpressed at 200 MPa for 0.3 ks sintered at 923 to 1173 K for 1.8 ks under Ar atmosphere. The microstructure of the sintered compact was identified by XRD, SEM and TEM/EDS. Mechanical properties were evaluated by Vickers hardness and indentation fracture toughness tests. The compacts at less than 973 K consist of a TiAl 3 phase and remained phases of Al and TiO 2 , while the compact at more than 1023 K consist of TiAl 3 matrix, dispersed Al 2 O 3 particles and some plate like Ti 3 Al phase. The compacts at more than 1023 K have the higher hardness around 800 Hv compared to TiAl 3 single phase compact with 450 Hv. The fracture toughness of TiAl 3 /Al 2 O 3 composite is about two times TiAl 3 single phase compact. This improvement of hardness and toughness is attributed to the effect of the microstructure formation of dispersed Al 2 O 3 particles and Ti 3 Al plate like phase in the TiAl 3 matrix.

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“…systems have focused on the mechanical properties of the ternary L1 2 trialuminide compounds. [5][6][7][8][9][10][11] These potential (Al, X) 3 Ti compounds have good oxidation resistance and some ductility because the L1 2 structure has the five independent slip systems condition required for homogeneous deformation. However, the ternary L1 2 compounds are still brittle in tension and/or bending, although they exhibit appreciable compressive ductility at ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of L12-(Al, Cr)3Ti/Ti2AlC Composites Prepared by Combustion Synthesis

et al. 2002

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L1 2 -(Al, Cr) 3 Ti/Ti 2 AlC composites have been prepared by the reactive arc-melting technique using elemental powders of Ti, Al, Cr, and C. Resulting composites have been reinforced using 4.5, 9, and 18 vol%Ti 2 AlC in a matrix of L1 2 trialuminide Ti-61 mol%Al-13 mol%Cr alloy. The Ti 2 AlC particles having a rod-like morphology of 1.5 µm width and 5-20 µm in length were homogeneously dispersed in the matrix. The matrix grain size was reduced through addition of Ti 2 AlC particles. These composite materials have revealed higher mechanical properties (bending strength and fracture toughness) than that of the monolithic alloy. This improvement is attributed to the Ti 2 AlC particles dispersion and to the fine grain of the matrix.

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Formation of structural L12 compounds in TiAl3-base alloys containing Mn

Cited by 114 publications

References 11 publications

Trialuminide intermetallic alloys for elevated temperature applications—overview

Trialuminide intermetallic alloys for elevated temperature applications—overview

Microstructure and Mechanical Properties of TiAl<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> <i>in situ</i> Composite by Combustion Process

Microstructure and Mechanical Properties of L1<SUB>2</SUB>-(Al, Cr)<SUB>3</SUB>Ti/Ti<SUB>2</SUB>AlC Composites Prepared by Combustion Synthesis

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