NDLI: The Tensile Mechanical Properties of Thermomechanically Consolidated Titanium at Different Strain Rates

Content Provider	Springer Nature Link
Author	Liang, Cun Ma, Mingxing Jia, Mingtu Rayva, Stiliana Yan, Jianqiang Zhang, Deliang
Copyright Year	2015
Abstract	The microstructures, tensile mechanical properties, and fracture behavior of a commercially pure (CP) titanium disk (called PF/Ti disk) and a CP titanium bar (called PE/Ti bar) made by powder compact forging (PCF) and powder compact extrusion (PCE) respectively have been studied. With increasing the strain rate from 10$^{−4}$ to 10$^{−1}$ s$^{−1}$, the yield strength of the PF/Ti disk and PE/Ti bar increased from 708 to 811 MPa and from 672 to 764 MPa, respectively; their UTS increased from 824 to 1009 MPa and from 809 to 926 MPa, respectively, and their elongation to fracture decreased from 21 to 8 pct and from 25 to 17.8 pct, respectively. With a low strain rate of 10$^{−4}$ s$^{−1}$, the PF/Ti disk did not show any cavities at unbonded or weakly bonded interparticle boundaries, but the PE/Ti bar showed a small number of cavities with sizes of around 1 μm. With a high strain rate of 10$^{−2}$ s$^{−1}$, the PF/Ti disk showed a small number of cavities with sizes in the range of 0.1 to 0.5 μm, while for the PE/Ti bar, the cavities grew into microcracks of up to 20 μm long. The findings suggest that close to 100 pct of consolidation is rapidly achieved by PCF at 1573 K (1300 °C) and PCE at 1523 K (1250 °C), respectively, possibly due to the dissolution of the particle oxide surface films during heating and rapid diffusion bonding between the fresh particle surfaces during PCF and PCE.
Starting Page	5095
Ending Page	5102
Page Count	8
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	46
Issue Number	11
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2015-08-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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