Deformation and Fracture Behaviors in the Freestanding APS-TBC - Effects of Process Parameters and Thermal Exposure

Thermal barrier coatings (TBCs), that reduce the temperature in the underlying substrate material, are an essential requirement for the hot section components of industrial gas turbines. Recently, in order to take full advantage of the potential of the TBC systems, experimental and analytical investigations in TBC systems have been performed. However there is a little information on the deformation behavior of the top coating. In addition, the effects of the thermal exposure and the process parameters on the mechanical properties of the top coating have never been clarified. From these backgrounds, the effects of the process variables in APS and the thermal exposure on the mechanical properties were investigated in order to optimize the APS process of top coatings. The experimental results indicated that the mechanical properties of the APS-TBC, i.e. the tensile strength and the elastic modulus, were significantly changed by the process variables and the long term thermal exposure. The microstructural investigation was also carried out and the relationship between the mechanical properties and the porosity was discussed.

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Deformation and fracture behavior of an Al-Li-Cu-Mg-Zr alloy 8090

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100178008 ◽

1990 ◽

Vol 48 (4) ◽

pp. 974-975

Author(s):

D.M. Jiang ◽

B.D. Hong

Keyword(s):

High Strength ◽

Deformation And Fracture ◽

Fracture Behaviors ◽

Aluminum Lithium ◽

Carbon Fiber Reinforced Composites ◽

Peak Aged ◽

Aluminum Lithium Alloys ◽

High Strength Aluminum Alloys ◽

Lithium Alloys ◽

Zr Alloy

Aluminum-lithium alloys have been recently got strong interests especially in the aircraft industry. Compared to conventional high strength aluminum alloys of the 2000 or 7000 series it is anticipated that these alloys offer a 10% increase in the stiffness and a 10% decrease in density, thus making them rather competitive to new up-coming non-metallic materials like carbon fiber reinforced composites.The object of the present paper is to evaluate the inluence of various microstructural features on the monotonic and cyclic deformation and fracture behaviors of Al-Li based alloy. The material used was 8090 alloy. After solution treated and waster quenched, the alloy was underaged (190°Clh), peak-aged (190°C24h) and overaged (150°C4h+230°C16h). The alloy in different aging condition was tensile and fatigue tested, the resultant fractures were observed in SEM. The deformation behavior was studied in TEM.

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Deformation and fracture behaviors of AZ31B Mg alloy at elevated temperature under uniaxial compression

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2018.12.260 ◽

2019 ◽

Vol 783 ◽

pp. 863-876 ◽

Cited By ~ 52

Author(s):

Weitao Jia ◽

Lifeng Ma ◽

Qichi Le ◽

Chenchen Zhi ◽

Pengtao Liu

Keyword(s):

Elevated Temperature ◽

Uniaxial Compression ◽

Mg Alloy ◽

Deformation And Fracture ◽

Fracture Behaviors

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Effect of microstructures on the compressive deformation and fracture behaviors of Zr47Cu46Al7 bulk metallic glass composites

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2007.06.062 ◽

2007 ◽

Vol 353 (52-54) ◽

pp. 4707-4717 ◽

Cited By ~ 26

Author(s):

J.T. Fan ◽

F.F. Wu ◽

Z.F. Zhang ◽

F. Jiang ◽

J. Sun ◽

...

Keyword(s):

Metallic Glass ◽

Bulk Metallic Glass ◽

Compressive Deformation ◽

Glass Composites ◽

Bulk Metallic Glass Composites ◽

Deformation And Fracture ◽

Fracture Behaviors

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Deformation and Fracture Behaviors of Polyethylene Coatings on the Natural Gas Transmission Line With Ultraviolet Exposure

Volume 2: Design and Construction; Pipeline Automation and Measurement; Environmental Issues; Rotating Equipment Technology ◽

10.1115/ipc1998-2076 ◽

1998 ◽

Author(s):

Seong-Min Lee ◽

Sung-Sik Shin ◽

Hong-Seok Song ◽

Young-Tai Kho

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Fracture Mode ◽

Uv Exposure ◽

Uv Resistance ◽

Deformation And Fracture ◽

Red Color ◽

Fracture Behaviors ◽

Natural Gas Transmission ◽

Color Pigment

The effect of carbon black, ultraviolet (UV) stabilizer and color pigment on the mechanical property of polyethylene (PE) has been investigated. The transition of fracture mode from ductile to brittle upon UV exposure is identified through microscopic examination of fracture surface. This transition is responsible for the degradation of mechanical properties. The carbon black doped PE shows excellent UV resistance regardless of the presence of UV stabilizer. The mechanical properties of the PE remained unchanged even after 50-days UV exposure. The ductile fracture mode is also maintained in this case. The addition of red color pigment exhibited a very poor UV resistance.

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