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Durability Assessment of Gamma Tial by Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al - Paperback
74.55 AED

Durability Assessment of Gamma Tial by Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al - Paperback

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Category Type
Politics
ISBN
9781287272090
Author
Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al
Publisher
Bibliogov
Description:

Gamma TiAl was evaluated as a candidate alloy for low-pressure turbine blades in aeroengines. The durability of g-TiAl was studied by examining the effects of impact or fretting on its fatigue strength. Cast-to-size Ti-48Al-2Cr-2Nb was studied in impact testing with different size projectiles at various impact energies as the reference alloy and subsequently fatigue tested. Impacting ...

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PRODUCT INFORMATION

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    Specifications

    Category Type
    Politics
    ISBN
    9781287272090
    Item EAN
    2724352863585
    People
    Author
    Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al
    People
    Publisher
    Bibliogov
    Category Type
    Politics
    ISBN
    9781287272090
    Item EAN
    2724352863585
    People
    Author
    Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al
    People
    Publisher
    Bibliogov
    Technical Information
    Binding
    Paperback
    Languages and countries
    Book Language
    English
    Read more
  •  

    Description:

    Gamma TiAl was evaluated as a candidate alloy for low-pressure turbine blades in aeroengines. The durability of g-TiAl was studied by examining the effects of impact or fretting on its fatigue strength. Cast-to-size Ti-48Al-2Cr-2Nb was studied in impact testing with different size projectiles at

    Gamma TiAl was evaluated as a candidate alloy for low-pressure turbine blades in aeroengines. The durability of g-TiAl was studied by examining the effects of impact or fretting on its fatigue strength. Cast-to-size Ti-48Al-2Cr-2Nb was studied in impact testing with different size projectiles at various impact energies as the reference alloy and subsequently fatigue tested. Impacting degraded the residual fatigue life. However, under the ballistic impact conditions studied, it was concluded that the impacts expected in an aeroengine would not result in catastrophic damage, nor would the damage be severe enough to result in a fatigue failure under the anticipated design loads. In addition, other gamma alloys were investigated including another cast-to-size alloy, several cast and machined specimens, and a forged alloy. Within this Ti-48-2-2 family of alloys aluminum content was also varied. The cracking patterns as a result of impacting were documented and correlated with impact variables. The cracking type and severity was reasonably predicted using finite element models. Mean stress affects were also studied on impact-damaged fatigue samples. The fatigue strength was accurately predicted based on the flaw size using a threshold-based, fracture mechanics approach. To study the effects of wear due to potential applications in a blade-disk dovetail arrangement, the machined Ti-47-2-2 alloy was fretted against In-718 using pin-on-disk experiments. Wear mechanisms were documented and compared to those of Ti-6Al-4V. A few fatigue samples were also fretted and subsequently fatigue tested. It was found that under the conditions studied, the fretting was not severe enough to affect the fatigue strength of g-TiAl.

    Product Features:
    • Category: Politics
    • Binding: Paperback
    • Language of Text: English
    • Author(s): Susan L. Draper, Nasa Technical Reports Server (Ntrs), Et Al
    • Publisher: Bibliogov
    • ISBN: 9781287272090
    • Number of Pages: 140
    • Dimensions: 9.69 x 7.44 x 0.3 inches
 

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