Effect of the Microcrack Inclination Angle on Crack Propagation Behavior of TiAl Alloy

Effect of the Microcrack Inclination Angle on Crack Propagation Behavior of TiAl Alloy

Feng, R.C. ; Lu, J.T. ; Li, H.Y. ; Cao, H. ; Rui, Z.Y.

Інші назви: Анализ влияния угла наклона микротрещины на характеристики роста трещин в сплаве TiAl

Тема: Научно-технический раздел

УДК: 539.4

URI: http://dspace.nbuv.gov.ua/handle/123456789/173586

Посилання: Effect of the Microcrack Inclination Angle on Crack Propagation Behavior of TiAl Alloy / R.C. Feng, J.T. Lu, H.Y. Li, H. Cao, Z.Y. Rui // Проблемы прочности. — 2017. — № 1. — С. 87-94. — Бібліогр.: 25 назв. — англ.

Підтримка: This work was financially supported by National Natural Science Foundation of Gansu Province, China (No. 148RJZA008), Research project of Gansu Province, China (No. 2014A-033) and Doctoral research fundation of L anzhou University of Technology. Feng Ruicheng would like to thank Key Laboratory of Digital Manufacturing Technology and Application, the Ministry of Education, Lanzhou University of Technology for providing help.

Дата: 2017

Завантажень: 435

Effect of the Microcrack Inclination Angle on Crack Propagation Behavior of TiAl Alloy

Анотація:

Molecular dynamics simulation was employed to make the model of crack propagation for singlecrystal y-TiAl alloy. The effects of the angle between a microcrack and loading direction on crack propagation were studied through the analysis of the atomic configurations and stress—strain curves in the paper. The results show that the time for the emission of first dislocation and the yield stress value decrease with the angle. The crack propagation occurs by the submain crack mechanism, which becomes more obvious as the angle increases and the number of stacking faults and stair-rod dislocations decreases.

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