The Quantitative Relationships between Microstructure and Damage Tolerance of TC21 Titanium Alloy

Abstract:

Mechanical properties, including fracture toughness and the fatigue crack propagation, have been investigated for two different microstructures in TC21 titanium alloy. The characteristic parameters of lamellar microstructure were measured through quantitative metallography. On the basis of analyzing the influence of microstructure on the fracture toughness of TC21 titanium alloy, the mathematical models between the fracture toughness and microstructure parameters were constructed. Furthermore, the relationship between fatigue crack growth rate and mean length values of α lamellar have been also investigated and a novel predicting model was established.

• Periodical: Materials Science Forum (Volume 770)
• Pages: 335-340
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.770.335
• Online since: October 2013
• Authors: Jun Cheng, Ming He Chen, Zhi Shou Zhu
• Keywords: Damage Tolerance, Microstructure, TC21 Titanium Alloy

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