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Metals 2019, 9(2), 175; https://doi.org/10.3390/met9020175

Changes of Microstructures and Mechanical Properties in Commercially Pure Titanium after Different Cycles of Proposed Multi-Directional Forging

1
College of Mechanical Engineering, Guangxi University, No. 100 Daxue Dong Road, Nanning 530004, China
2
College of Mechanical Engineering, Beibu Gulf University, No. 12 Binhai Avenue, Qinzhou 535011, China
*
Author to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 27 January 2019 / Accepted: 30 January 2019 / Published: 2 February 2019
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Abstract

A newly proposed multi-directional forging (MDF) was successfully applied to a commercially pure titanium (CP Ti). Severe plastic deformation would result in significant and complex changes of microstructure and mechanical properties, so microstructure characterization and a mechanical test of CP Ti were conducted after different cycles of MDF. The results demonstrated that dynamic recrystallization was the dominant grain refinement mechanism of MDF CP Ti. With increasing the cycles of MDF, grain size, fraction of low angle grain boundaries and dislocations density decreased due to grain refined. After three cycles of MDF, the mean grain size was about 200 nm. The values of tensile strength and hardness increased significantly from zero cycles to one cycle of MDF, but increased slowly after one MDF cycle. Numerous dimples and tear ridges were present, but the dimples were smaller and shallower with increasing cycles of MDF. View Full-Text
Keywords: pure titanium; multi-directional forging; mechanical property; microstructure; fractography pure titanium; multi-directional forging; mechanical property; microstructure; fractography
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zheng, Z.; Zhang, X.; Xie, L.; Huang, L.; Sun, T. Changes of Microstructures and Mechanical Properties in Commercially Pure Titanium after Different Cycles of Proposed Multi-Directional Forging. Metals 2019, 9, 175.

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