Influence of Temperature on Fatigue Crack Propagation in TiAl Alloys*

Feng, Rui; Rui, Zhi Yuan; Zuo, Yan Rui; Chen, Yan; Zhang, G. T.

doi:10.1007/s11223-014-9563-5

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…Stage II) is essential. FCG data of region II fatigue of Ti–48Al–2Mn–2Nb [19,20] shows that both the crack growth prefactor, , and the Paris slope, n , decrease significantly above 750C (the latter to n =4), suggesting that once the ductile–brittle transition is exceeded, damage-tolerant design may be achievable if sufficient strength can be maintained. It has been reported that the Paris slope is lower when the lamellae in a TiAl lamellar colony are oriented parallel to the loading axis [21].…”

Section: Conventional Macroscopic Analysis Of the Hcf Behaviour Of γ-...mentioning

confidence: 99%

Recent progress in the high-cycle fatigue behaviour of γ-TiAl alloys

Edwards

2018

Materials Science and Technology

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The high-cycle fatigue (HCF) properties of γ -TiAl (gamma titanium aluminide) alloys are reviewed, particularly with regards to the deformation mechanisms active in the near-threshold cyclic loading regime. By examining the influence of lamellar orientation and thickness on the HCF threshold, in addition to more conventional microstructural considerations such as the grain size or the volume fraction of lamellar colonies, factors to improve the γ -TiAl microstructure for HCF are assessed. Finally, experimental methods and loading strategies are surveyed to identify techniques for improving HCF testing of γ -TiAl alloys. In this, we consider both the conservativism of differing approaches and the possibility to measure with suitable resolution the local mechanical behaviour under HCF of the lamellar γ -TiAl microstructure. ARTICLE HISTORY

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Section: Conventional Macroscopic Analysis Of the Hcf Behaviour Of γ-...mentioning

confidence: 99%

Recent progress in the high-cycle fatigue behaviour of γ-TiAl alloys

Edwards

2018

Materials Science and Technology

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“…Apart from oxidation, the fatigue crack propagation rate is found to be stro fected by temperature. Feng et al [103] noted the increase in the fatigue crack gro in the temperature range of 25-750 °C. Nevertheless, when the temperature was 750 and 850 °C, the rate decreased.…”

Section: Microstructural Mechanismsmentioning

confidence: 97%

“…To take into account both stage It is noteworthy that the Paris model (Equation ( 3)) has been modified by several researchers to incorporate other important factors that significantly influence the FCGR of these intermetallic alloys. For instance, to reflect the influence of average stress on the crack propagation rate and to show the effects of accelerated crack propagation when the stress intensity factor ∆K approaches the critical value K IC , Forman [103] modified the Paris model as follows:…”

Section: Fatigue Crack Propagation Modelsmentioning

confidence: 99%

“…This model was designed to describe stages II and III for medium and rapid fatigue crack propagation, respectively. To take into account both stage I and II of crack propagation, Zheng and Hirt [103] also modified the Paris model to produce a model known as the passivation cracking model of the crack tip which is expressed in Equation (5).…”

Section: Fatigue Crack Propagation Modelsmentioning

confidence: 99%

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Low-Cycle Fatigue Behaviour of Titanium-Aluminium-Based Intermetallic Alloys: A Short Review

Ellard,

Mathabathe,

Siyasiya

et al. 2023

Metals

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Over the past decade, relentless efforts have brought lightweight high-temperature γ-TiAl-based intermetallic alloys into real commercialisation. The materials have found their place in General Electric’s (GE) high bypass turbofan aircraft engines for the Boeing 787 as well as in the PW1100GTF engines for low-pressure turbine (LPT) blades. In service, the alloys are required to withstand hostile environments dominated by cyclic stresses or strains. Therefore, to enhance the fatigue resistance of the alloys, a clear understanding of the alloys’ response to fatigue loading is pivotal. In the present review, a detailed discussion about the low-cycle fatigue (LCF) behaviour of γ-TiAl-based alloys in terms of crack initiation, propagation and fracture mechanisms, and the influence of temperature and environment on cyclic deformation mechanisms and the resulting fatigue life has been presented. Furthermore, a comprehensive discussion about modelling and prediction of the fatigue property of these alloys with regard to the initiation and propagation lives as well as the total fatigue life has been provided. Moreover, effective methods of optimising the microstructures of γ-TiAl-based alloys to ensure improved LCF behaviour have been elucidated.

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“…Within this event, a special session named mechanical properties of materials was held. In this session, 31 papers were selected for publication, among which 20 papers are published in this special issue [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], two more [21,22] in the next issue, and 9 papers are published by Materials Research Innovations [23][24][25][26][27][28][29][30][31]. All papers underwent the standard peer-review process of the journal and were accepted for publication based on the evaluations of at least two independent anonymous reviewers.…”

mentioning

confidence: 99%

Review: Progress in the Studies on Mechanical Properties of Materials

Velasco

Vallés

et al. 2014

Strength Mater

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à Êèòàéñêèé ãåîíàó÷íûé óíèâåðñèòåò, Êîìïüþòåðíàÿ âûñøàÿ øêîëà, Óõàíü, Êèòàé á Tåõíè÷åñêèé óíèâåðñèòåò Êàòàëîíèè, Îòäåë ìàòåðèàëîâåäåíèÿ è ìåòàëëóðãèè, Òåððàññà, Èñïàíèÿ â Óíèâåðñèòåò Ìàí÷åñòåðà, Âûñøàÿ øêîëà ìàòåðèàëîâ, Ìàí÷åñòåð, Âåëèêîáðèòàíèÿ ã Íàöèîíàëüíûé íàó÷íî-èññëåäîâàòåëüñêèé ñîâåò Èòàëèè, Èíñòèòóò êîìïîçèòíûõ è áèîìåäèöèíñêèõ ìàòåðèàëîâ, Íåàïîëü, Èòàëèÿ ä Íàöèîíàëüíàÿ ëàáîðàòîðèÿ Îàê Ðèäae, Öåíòð íàíîôàçíîãî ìàòåðèàëîâåäåíèÿ, Îàê Ðèäae, ÑØÀ å Õóáåéñêèé íàó÷íî-òåõíîëîãè÷åñêèé óíèâåðñèòåò, Âûñøàÿ øêîëà ýëåêòðîíèêè è èíôîðìàòèêè, Êñèàíèíã, Êèòàé ae Óõàíüñêèé óíèâåðñèòåò, Ìåaeäóíàðîäíàÿ øêîëà êîìïüþòåðíîãî ïðîãðàììèðîâàíèÿ, Óõàíü, Êèòàé

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Influence of Temperature on Fatigue Crack Propagation in TiAl Alloys*

Cited by 5 publications

References 11 publications

Recent progress in the high-cycle fatigue behaviour of γ-TiAl alloys

Recent progress in the high-cycle fatigue behaviour of γ-TiAl alloys

Low-Cycle Fatigue Behaviour of Titanium-Aluminium-Based Intermetallic Alloys: A Short Review

Review: Progress in the Studies on Mechanical Properties of Materials

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