Phase Transformations in Nb-Al-Ti alloys

1996 ◽  
Vol 27 (6) ◽  
pp. 1647-1659 ◽  
Author(s):  
E. S. K. Menon ◽  
P. R. Subramanian ◽  
D. M. Dimiduk
Keyword(s):  
Phase Transformations ◽  
Ti Alloys

Phase transformations in Fe3AL + Ti alloys

1994 ◽  
Vol 55 (6) ◽  
pp. 505-515 ◽  
Author(s):  
C.H. Sellers ◽  
T.A. Hyde ◽  
T.K. O'Brien ◽  
R.N. Wright
Keyword(s):  
Phase Transformations ◽  
Ti Alloys

Phase transformations in dilute U-TI alloys

1986 ◽  
Vol 121 ◽  
pp. 483-486 ◽  
Author(s):  
G. Kimmel ◽  
A. Landau ◽  
J. Sariel ◽  
U. Admon
Keyword(s):  
Phase Transformations ◽  
Ti Alloys

Phase Transformations in Beta-Ti Alloys Studied by In-Situ Methods

2016 ◽  
pp. 437-441 ◽  
Author(s):  
Petr Harcuba ◽  
Jana Šmilauerová ◽  
Máhal Hájek ◽  
Pavel Zháňal ◽  
Jan Čapek
Keyword(s):  
Phase Transformations ◽  
Ti Alloys ◽  
In Situ Methods

Stability of thermal-induced phase transformations in the severely deformed equiatomic Ni–Ti alloys

2012 ◽  
Vol 47 (16) ◽  
pp. 6005-6014 ◽  
Author(s):  
K. K. Mahesh ◽  
F. M. Braz Fernandes ◽  
G. Gurau
Keyword(s):  
Phase Transformations ◽  
Ti Alloys

In Situ Experiment for Laser Beam Welding of Ti Alloys Using High-Energy X-Rays

2017 ◽  
Vol 905 ◽  
pp. 114-119
Author(s):  
Peter Staron ◽  
Jie Liu ◽  
Stefan Riekehr ◽  
Norbert Schell ◽  
Norbert Huber ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Laser Beam ◽  
Phase Transformations ◽  
Laser Beam Welding ◽  
High Energy ◽  
X Rays ◽  
Synchrotron Source ◽  
Ti Alloys ◽  
In Situ Experiments

The laser beam welding (LBW) process has many advantages for industrial production; however, it still has to be optimized for two-phase Ti alloys. Phase transformations and residual stresses play a crucial role for welding these alloys. Specific questions about the development of phase content during fast heating with a laser and rapid cooling can only be addressed with time-resolved in-situ experiments, avoiding artefacts from quenching. Also the residual stress development during cooling depends on the occurring phase transformations. Thus, an LBW chamber employing a fibre laser was developed for use with high-energy X-rays from a synchrotron source. Bead-on-plate welding experiments with 2.5 mm thick samples were carried out at the HZG high-energy materials science beamline (HEMS) at DESY, Hamburg. The first experiments focused on the solid-solid phase transformations in a Ti-6Al-4V alloy. Moreover, residual stresses developing during cooling were studied.

Mechanically-Induced Phase Transformations in Plutonium Alloys

1988 ◽  
Vol 32 ◽  
pp. 577-584
Author(s):  
P. L. Wallace ◽  
W. L. Wien ◽  
R. P. Goehner
Keyword(s):  
Phase Transformations ◽  
Mechanical Strain ◽  
Parent Phase ◽  
Surface Damage ◽  
Data File ◽  
Quantitative Phase Analysis ◽  
X Ray Diffraction ◽  
Ti Alloys ◽  
File Structure ◽  
Xrd Patterns

AbstractIn this article, we show that mechanically-induced phase transformations can be readily achieved in two Pu-alloy systems. We have observed mechanically-induced phase transformations in both Ti-stabilized β-Pu and Ga-stabilized δ-Pu, In both of these alloys, the parent phase has been largely transformed to α-Pu, and the cause of these transformations was mechanical strain introduced by the metallographic sample preparation. For the Ga alloys, x-ray diffraction (XRD) patterns were taken at about 1.5-μm steps down to the undisturbed material in order to develop depth profiles of the surface damage. The total depth of the disturbed material in these alloys is estimated to be about 7.6μm, but this depth was not measured for the Ti alloys. The proportions of α-Pu and δ-Pu in the Ga alloys have been estimated using (a) a new quantitative phase analysis program (SPECQUAN) that uses multiple peaks of each phase in order to minimize the effects of preferred orientation and (b) an older manual technique (i.e., hand calculations). The results from these techniques are compared. SPECQUAN was developed to use the Specplot data file structure directly, thus reducing our data processing. The program is written in Fortran 77 and employs an external intensity ratio quantification procedure to obtain its results. XRD calibration has been done independently by means of accurate density measurements on a reference Ga alloy.

Kinetic Pathways of Phase Transformations in Two-Phase Ti Alloys

2014 ◽  
Vol 45 (8) ◽  
pp. 3438-3445 ◽  
Author(s):  
Tae Wook Heo ◽  
Donald S. Shih ◽  
Long-Qing Chen
Keyword(s):  
Phase Transformations ◽  
Two Phase ◽  
Ti Alloys
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