Development study on ATREX engine

Tanatusgu, Nobuhiro; Satô, Tetsuya; Naruo, Yoshihiro; Kashiwagi, Takeshi; Mizutani, Tomoaki; Monji, Toshiyuki; Hamabe, Kenji

doi:10.1016/s0094-5765(97)00121-5

Cited by 18 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, it is considered that all three kinds of structures (types A through C) changed to the same irregular structure. When they were observed using [ 1] and [0 0], dislocations with a/2Ͻ1 0] and a/2[ 01]type Burgers vectors were invisible (Figures 11(b) and (c)). The area A with fine precipitates, shown in Figure 9(b), appeared when irregular rod-shaped precipitates were observed from the tip direction of the rod.…”

Section: Deformation Structurementioning

confidence: 99%

See 1 more Smart Citation

Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K

Yamabe‐Mitarai

Harada

2003

Metall Mater Trans A

View full text Add to dashboard Cite

Section: Deformation Structurementioning

confidence: 99%

“…[1] However, the suitable materials are very limited. [1] However, the suitable materials are very limited.…”

Section: Introductionmentioning

confidence: 99%

Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K

Yamabe‐Mitarai

Harada

2003

Metall Mater Trans A

View full text Add to dashboard Cite

“…[2,3] In other applications, there are new challenging possibilities, such as a heat exchanger in a ram jet engine or a thruster in a satellite. [4] In these applications, the working temperature must be high above 1473 K, which precludes the use of Ni-base superalloys. It is well known that the fcc and L1 2 coherent twophase structure plays an important role in the strengthening of Ni-base superalloys at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Compressive creep properties of Ir-base refractory superalloys

Yamabe‐Mitarai

Harada

2005

Metall Mater Trans A

View full text Add to dashboard Cite

Ir-base alloys with the fcc and L1 2 -Ir 3 X (X ϭ Nb, Zr) two-phase structure have been developed as next-generation high-temperature materials. The compressive creep behavior of Ir-Nb and Ir-Zr alloys was investigated at 2073 K under 137 MPa. The effect of addition of the third element, Zr, on the creep behavior of an Ir-Nb alloy was also investigated at 2073 K for 137 MPa. The creep rate became two orders lower by addition of a small amount of Zr. The lattice misfit change between the fcc and L1 2 two phase by addition of Zr and the deformation structure in binary and ternary alloys after a creep test were also investigated. The creep behavior is discussed in terms of the lattice misfit, precipitate shape, and their distribution.

show abstract

“…In terms of the mechanical properties at elevated-temperature, TiAl-based alloys, as a kind of novel material that has the potential to replace the Ni-based superalloys in the field of vehicle manufacturing and aviation industry, are mainly expected to be used in the manufacture of high-temperature components of aircraft engines [ 24 ]. In recent years, with the proposal of the concept of hypersonic aircraft, the requirements for the performance of aero-engines have continued to increase, and the demand for the upper limit of the service temperature of materials has also continued to increase [ 25 ]. According to the previous studies of the elevated-temperature mechanical properties of TiAl-based alloys bonding joints, the range of the texting temperature is mainly under 650 °C [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

The Relationship between Microstructure and Fracture Behavior of TiAl/Ti2AlNb SPDB Joint with High Temperature Titanium Alloy Interlayers

et al. 2022

View full text Add to dashboard Cite

In this paper, spark plasma diffusion bonding technology was employed to join TiAl and Ti2AlNb with high temperature titanium alloy interlayer at 950 °C/10kN/60 min, then following furnace cooling at cooling rate up to 100 °C/min. After welding, the joint was aging heat-treated at 800 °C for 24 h. The microstructure and the elements diffusion of the TiAl/Ti2AlNb joint was analyzed by field emission scanning electron microscopy (FESEM) with EDS. Moreover, the tensile properties of the joint were tested at room temperature, 650 °C, and 750 °C. The results show that the spark plasma diffusion bonding formed a high quality TiAl/Ti2AlNb joint without microcracks or microvoids, while also effectively protecting the base metal. Significant differences in the microstructure of the joint appeared from TiAl side to Ti2AlNb side: TiAl BM (Base Metal) → DP(Duplex) and NG (Near-Gamma) → α2-phase matrix with needle-like α-phase → bulk α2-phase → needle-like α-phase → metastable β-phase → Ti2AlNb BM. After heat treatment at 800 °C for 24 h, the microstructure of the TiAl side and the interlayer region did not change, but the density and size of the needle-like α-phase in region 3 increased slightly. The microstructure of Ti2AlNb near the weld changed obviously, and a large number of fine O phases are precipitated from the metastable β phase matrix after heat treatment. Except for the Ti2AlN near-interface region, the effect of heat treatment on the microstructure of the joint is not significant. The microhardness of the joint is in the shape of a mountain peak. The maximum microhardness at the interface is above 500 HV, and it is significantly reduced to 400 HV after heat treatment. The fracture of the joint occurred at the interface at room temperature, 650 °C, and 750 °C. with the tensile strength 450 MPa, 540 MPa, and 471 Mpa, respectively, and mainly showing brittle fracture.

show abstract

Development study on ATREX engine

Cited by 18 publications

References 2 publications

Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K

Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K

Compressive creep properties of Ir-base refractory superalloys

The Relationship between Microstructure and Fracture Behavior of TiAl/Ti2AlNb SPDB Joint with High Temperature Titanium Alloy Interlayers

Contact Info

Product

Resources

About