Effect of dwell time on creep-fatigue life of a high-Nb TiAl alloy at 750 °C. (December 2015)

• Record Type: Journal Article
• Authors: Yu, Long; Song, Xiping; You, Li; Jiao, Zehui; Yu, Huichen
• Is Part Of: Scripta materialia. Volume 109(2015)
• Page Start: 61
• Page End: 63
• Publication Date: 2015-12
• Subjects: Titanium aluminides -- Creep -- Fatigue -- Lifetime -- Dwell time; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.07.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: The creep-fatigue life of a cast Ti-45Al-8.0Nb-0.2W-0.2B-0.1Y (at.%) alloy was investigated at 750 °C by the consideration of effective dwell time. The life to failure decreases linearly with the increase of effective dwell time, and decreases exponentially with the increase of minimum creep rate. A linear formula and a power-law formula for the life prediction of creep-fatigue were proposed. Both creep-fatigue life prediction formulae have a good agreement with the experimental data.