Cyclic Stress-Strain Response and Dislocation Configuration of a Beta Phase Containing TiAl Alloy during Isothermal Fatigue Tests under Different Strain Rate

Hong Fu Xiang; Jing Hai Tao; Ji Heng Wang; Hui Li; An Lun Dai

doi:10.4028/www.scientific.net/AMR.683.314

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 683Cyclic Stress-Strain Response and Dislocation...

Cyclic Stress-Strain Response and Dislocation Configuration of a Beta Phase Containing TiAl Alloy during Isothermal Fatigue Tests under Different Strain Rate

Abstract:

A beta phase containing titanium aluminum compound was prepared. Isothermal Fatigue(IF) were subjected at 650 °C at three strain rates, such as 6.67×10^-3 s^-1, 6.67×10^-4 s^-1, 6.67×10^-5 s^-1 to determine the effect of strain rate on cyclic stress-strain response (CSSR) of TiAl alloy during IF tests. The curves of cyclic stress-strain response were discussed and dislocations configuration were also observed by TEM. The results show that strain rates have an apparent effect on CSSR of TiAl alloy during IF tests and CSSR was identified that it had a close relationship with dislocation configuration and deformation twin.

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Periodical:

Advanced Materials Research (Volume 683)

Pages:

314-317

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.683.314

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Online since:

April 2013

Authors:

Hong Fu Xiang, Jing Hai Tao, Ji Heng Wang, Hui Li, An Lun Dai

Keywords:

Cyclic Stress-Strain Response, Dislocation Configuration, Isothermal Fatigue, Strain Rate, Titanium Aluminum Compound

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