The effects of HIP pore closure and age hardening on primary creep and tensile property variations in a TiAl XD™ alloy with 0.1wt.% carbon

Simpkins, Raymond J.; Rourke, Michael P.; Bieler, T. R.; McQuay, P.

doi:10.1016/j.msea.2006.09.114

Cited by 25 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[9,14,15,28]). Respective investigations using primary annealed sheet material of both compositions, however, gave no indication for the presence of such precipitates.…”

Section: Accommodation Of Carbonmentioning

confidence: 99%

Microstructure and mechanical properties of Ti 45Al 5Nb+(0–0.5C) sheets

Gerling¹,

Schimansky²,

Stark

et al. 2008

Intermetallics

View full text Add to dashboard Cite

The possible application of gamma titanium aluminides in aerospace industry requires a detailed understanding of the microstructuree property relationship of sheets made from this material. This paper reports the mechanical properties of sheets up to 1000 C, based on alloy concepts with high Nb concentrations and small additions of C. Sheets were manufactured by rolling powder metallurgical compacts with compositions Ti 45Al 5Nb and Ti 45Al 5Nb 0.5C. The microstructures of both sheets are ''near gamma'' and consist of g-TiAl and a 2 -Ti 3 Al phases. The texture of both phases is very weak. The strengths levels are very high and that of the C-containing sheet exceeds that of the C-free material at RT by w200 MPa. The mechanical properties of Ti 45Al 5Nb are independent of the direction in the sheet, in the whole temperature range from RT to 1000 C. However, for the C-containing sheet this is true only in the upper temperature range.

show abstract

“…[9,14,15,28]). Respective investigations using primary annealed sheet material of both compositions, however, gave no indication for the presence of such precipitates.…”

Section: Accommodation Of Carbonmentioning

confidence: 99%

Microstructure and mechanical properties of Ti 45Al 5Nb+(0–0.5C) sheets

Gerling¹,

Schimansky²,

Stark

et al. 2008

Intermetallics

View full text Add to dashboard Cite

show abstract

“…Thermal protection systems in aerospace vehicles including skin material for hypersonic aircraft, the inlet, combustor, and nozzle section of a hypersonic scramjet engine and future gas turbine engines are some of the prospective applications for g-TiAl sheet materials [1][2][3]. Presently, sheet processing of g-based TiAl alloys is accomplished via two different routes: ingot metallurgy (casting followed by hot isostatic pressing) and powder metallurgy [3][4][5][6]. Although these processes have proven to be reliable, neither method can directly process g-TiAl with good compositional uniformity and a fully lamellar microstructure.…”

Section: Introductionmentioning

confidence: 99%

Titanium aluminide sheets made using roll bonding and reaction annealing

Chaudhari

Acoff

2010

Intermetallics

View full text Add to dashboard Cite

“…An analogous situation arises when recrystallization accompanies pore closure during hot isostatic pressing of cast titanium alloys. [28,44,45] The local flow required to heal a large pore during hot isostatic pressing can be accompanied by sufficient local plastic deformation to cause recrystallization of the lamellar microstructure, and the interface between the lamellar and recrystallized regions is observed to initiate cracks frequently. [28,[44][45][46] C. Comparison with Fine-Grained Alloys Produced by Other Processing Routes Along with equal channel angular extrusion, equal channel angular pressing, high-pressure torsion, and cyclic channel die compression, FS processing is often considered to be another method of imposing severe plastic deformation (SPD) to ductile materials.…”

Section: B Fatigue Propertiesmentioning

confidence: 99%

The Effect of Friction Stir Processing on the Mechanical Properties of Investment Cast and Hot Isostatically Pressed Ti-6Al-4V

Pilchak

Williams

2010

Metall Mater Trans A

View full text Add to dashboard Cite

Friction-stir (FS) processing was used to modify the coarse, fully lamellar microstructure of investment cast and hot isostatically pressed (HIP'ed) Ti-6Al-4V. The effect of FS processing on mechanical properties was investigated using microtensile and four-point bend fatigue testing. The tensile results showed a typical microstructure dependence where yield strength and ultimate tensile strength both increased with decreasing slip length. Depending on the processing parameters, fatigue strength at 10 7 cycles was increased by 20 pct or 60 pct over that of the investment cast and HIP'ed base material. These improvements have been verified with a statistically significant number of tests. The results have been discussed in terms of the resistance of each microstructure fatigue crack initiation and small crack propagation. For comparison, a limited number of fatigue tests was performed on a + b forged Ti-6Al-4V with varying primary a volume fraction and also on investment cast material heat treated to produce a bi-lamellar condition.

show abstract

The effects of HIP pore closure and age hardening on primary creep and tensile property variations in a TiAl XD™ alloy with 0.1wt.% carbon

Cited by 25 publications

References 21 publications

Microstructure and mechanical properties of Ti 45Al 5Nb+(0–0.5C) sheets

Microstructure and mechanical properties of Ti 45Al 5Nb+(0–0.5C) sheets

Titanium aluminide sheets made using roll bonding and reaction annealing

The Effect of Friction Stir Processing on the Mechanical Properties of Investment Cast and Hot Isostatically Pressed Ti-6Al-4V

Contact Info

Product

Resources

About