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

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 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

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

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

Phenomena Associated with Oxygen in Titanium

1967 ◽  
Vol 25 ◽  
pp. 310-311
Author(s):  
E. U. Lee ◽  
P. A. Garner ◽  
J. S. Owens
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Microscope ◽  
Microstructural Changes ◽  
Electrolytic Polishing ◽  
Interstitial Impurities ◽  
Thin Foils ◽  
Transmission Electron ◽  
Iodide Titanium ◽  
Alpha Titanium

Evidence for ordering (1-6) of interstitial impurities (O and C) has been obtained in b.c.c. metals, such as niobium and tantalum. In this paper we report the atomic and microstructural changes in an oxygenated c.p.h. metal (alpha titanium) as observed by transmission electron microscopy and diffraction.Oxygen was introduced into zone-refined iodide titanium sheets of 0.005 in. thickness in an atmosphere of oxygen and argon at 650°C, homogenized at 800°C and furnace-cooled in argon. Subsequently, thin foils were prepared by electrolytic polishing and examined in a JEM-7 electron microscope, operated at 100 KV.

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