Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Microstructure Evolution of Pure Titanium during RD-ECAP
3.2. Mechanical Properties after RD-ECAP Processing
4. Discussion
4.1. Microstructure Characteristics and Deformation Behavior
4.2. Mechanical Properties
5. Conclusions
- (1)
- Pure titanium of grade 2 was successfully processed by RD-ECAP up to four passes at 420 °C. There was no cracking on the sample surface.
- (2)
- During the first and second passes of RD-ECAP, plastic deformation was accommodated mainly by twins, while the predominant deformation mechanism was dislocation slip during the third and fourth passes. {} twins were detected in the first pass, and {} twins occurred in the second pass of RD-ECAP.
- (3)
- There was an increase of ~39% in ultimate tensile strength after processing by RD-ECAP for four passes. The ultimate tensile strength increased from 450 MPa of the as-received condition to 627 MPa after four passes of RD-ECAP, while the elongation decreased from ~48% to ~29%.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Grain Size (μm) | Pressing Temperature (°C) | Pressing Speed (mm/s) | Twinning | Reference |
---|---|---|---|---|
~30 | 350 | 2 | {} | Kim et al. [28] |
~30 | 250–450 | 2 | {} | Kim et al. [18] |
~28 | RT | 0.5 | {} | Zhao et al. [21] |
~40–120 | 390–400 | 8 | {} | Fan et al. [29] |
- | 450 | 2 | {} | Li et al. [19] |
~22 | 450 | - | {}{} | Chen et al. [20] |
~200 | RT | - | {}{}{}{} | Chen et al. [23] |
~30 | 275 | 1 | {} | Meredith et al. [26] |
~10 | RT | 0.05 | {} | Zhang et al. [22] |
~10 | 420 | 0.1 | {} | Present Study |
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Gu, Y.; Ma, A.; Jiang, J.; Yuan, Y.; Li, H. Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing. Metals 2017, 7, 297. https://doi.org/10.3390/met7080297
Gu Y, Ma A, Jiang J, Yuan Y, Li H. Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing. Metals. 2017; 7(8):297. https://doi.org/10.3390/met7080297
Chicago/Turabian StyleGu, Yanxia, Aibin Ma, Jinghua Jiang, Yuchun Yuan, and Huiyun Li. 2017. "Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing" Metals 7, no. 8: 297. https://doi.org/10.3390/met7080297