The Study on Fracture Behavior in Hot Compression of As-Cast Ti60 Titanium Alloy

Abstract:

Hot compression testing of as-cast Ti60 alloy was carried out 970-1120 °C, 0.01-10 s¹ and 30-75%. The fracture behavior of the alloy was investigated by light optical microscope, scanning electron microscope. The result shows that, at high strain rate and large height reduction, 45° transgranular fracture and longitudinal intergranular fracture are observed, which are confirmed to be transgranular cleavage brittle fracture and ductile fracture respectively. Moreover, the cracking degree increases with the increasing height reduction. Besides, the alloy deformed at high temperature exhibits a good ductility, whereas lots of longitudinal cracks occurs on its surface due to the brittle alpha-case formation. Consequently, the systematic analysis on the fracture mechanism for as-cast Ti60 alloy is vitally necessary for the optimization of processing parameters in its cogging process.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 725-729
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.725
• Online since: August 2013
• Authors: Wen Wen Peng, Wei Dong Zeng, Qing Jiang Wang, Yan Chun Zhu
• Keywords: As-Cast Ti60 Titanium Alloy, Fracture Behavior, Hot Compression

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