Effect of testing conditions on the crack resistance of the titanium alloys VT1-0 and VT8

1977 ◽  
Vol 12 (3) ◽  
pp. 299-302
Author(s):  
O. N. Romaniv ◽  
N. A. Lenets ◽  
Yu. D. Petrina
Keyword(s):  
Crack Resistance ◽  
Titanium Alloys ◽  
Testing Conditions

Toughening effects of Mo and Nb addition on impact toughness and crack resistance of titanium alloys

2021 ◽  
Vol 79 ◽  
pp. 147-164
Author(s):  
Shixing Huang ◽  
Qinyang Zhao ◽  
Yongqing Zhao ◽  
Cheng Lin ◽  
Cong Wu ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Crack Resistance ◽  
Titanium Alloys ◽  
Nb Addition

Effects of oxygen content on Charpy impact properties and crack resistance of α titanium alloys

2021 ◽  
pp. 141394
Author(s):  
Shixing Huang ◽  
Qinyang Zhao ◽  
Cheng Lin ◽  
Cong Wu ◽  
Yongqing Zhao ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Titanium Alloys ◽  
Oxygen Content ◽  
Charpy Impact ◽  
Impact Properties

Effect of inclusion contaminants on the crack resistance of ductile titanium alloys. 1

1991 ◽  
Vol 23 (8) ◽  
pp. 854-862 ◽  
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
V. L. Yarusevich ◽  
V. I. Mikhailov ◽  
V. A. Sher
Keyword(s):  
Crack Resistance ◽  
Titanium Alloys

Effect of interstitial impurities on the crack resistance of ductile titanium alloys. 2

1991 ◽  
Vol 23 (8) ◽  
pp. 863-869
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
V. L. Yarusevich
Keyword(s):  
Crack Resistance ◽  
Titanium Alloys ◽  
Interstitial Impurities

Direct Observation of the Diffusionless β → β + ω Transformation in Titanium Alloys

1971 ◽  
Vol 29 ◽  
pp. 122-123
Author(s):  
N. E. Paton ◽  
D. de Fontaine ◽  
J. C. Williams
Keyword(s):  
Electron Microscope ◽  
Titanium Alloys ◽  
Direct Observation ◽  
Dark Field ◽  
X Ray Diffraction ◽  
Resistivity Measurements ◽  
Selected Area Electron Diffraction ◽  
Ti Alloys ◽  
Thin Foils ◽  
Field Device

The electron microscope has been used to study the diffusionless β → β + ω transformation occurring in certain titanium alloys at low temperatures. Evidence for such a transformation was obtained by Cometto et al by means of x-ray diffraction and resistivity measurements on a Ti-Nb alloy. The present work shows that this type of transformation can occur in several Ti alloys of suitable composition, and some of the details of the transformation are elucidated by means of direct observation in the electron microscope.Thin foils were examined in a Philips EM-300 electron microscope equipped with a uniaxial tilt, liquid nitrogen cooled, cold stage and a high resolution dark field device. Selected area electron diffraction was used to identify the phases present and the ω-phase was imaged in dark field by using a (101)ω reflection. Alloys were water quenched from 950°C, thinned, and mounted between copper grids to minimize temperature gradients in the foil.

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

TEM characterization of reaction zone in a SiC fiber-reinforced titanium alloy

1988 ◽  
Vol 46 ◽  
pp. 738-739
Author(s):  
G. Das ◽  
R. E. Omlor
Keyword(s):  
Titanium Alloys ◽  
Reaction Zone ◽  
Carbon Layer ◽  
Fiber Reinforced ◽  
Reaction Products ◽  
Sic Fibers ◽  
Sic Fiber ◽  
The Matrix ◽  
Immense Potential

Fiber reinforced titanium alloys hold immense potential for applications in the aerospace industry. However, chemical reaction between the fibers and the titanium alloys at fabrication temperatures leads to the formation of brittle reaction products which limits their development. In the present study, coated SiC fibers have been used to evaluate the effects of surface coating on the reaction zone in the SiC/IMI829 system.IMI829 (Ti-5.5A1-3.5Sn-3.0Zr-0.3Mo-1Nb-0.3Si), a near alpha alloy, in the form of PREP powder (-35 mesh), was used a茸 the matrix. CVD grown AVCO SCS-6 SiC fibers were used as discontinuous reinforcements. These fibers of 142μm diameter contained an overlayer with high Si/C ratio on top of an amorphous carbon layer, the thickness of the coating being ∽ 1μm. SCS-6 fibers, broken into ∽ 2mm lengths, were mixed with IMI829 powder (representing < 0.1vol%) and the mixture was consolidated by HIP'ing at 871°C/0. 28GPa/4h.

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