scholarly journals In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

2021 ◽  
Author(s):  
Michael Burtscher ◽  
Markus Alfreider ◽  
Klemens Schmuck ◽  
Helmut Clemens ◽  
Svea Mayer ◽  
...  
Keyword(s):  
Tial Alloy ◽  
Fully Lamellar

BEHAVIOR OF PLASTIC DEFORMATION AND CRACK PROPAGATION ON FULLY LAMELLAR GAMMA-TiAl ALLOY

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2958-2963
Author(s):  
MING SONG ◽  
GUANGJIE MAO ◽  
YUE MA ◽  
SHENGKAI GONG
Keyword(s):  
Plastic Deformation ◽  
Plastic Zone ◽  
Strain Field ◽  
Tial Alloy ◽  
Image Correlation ◽  
Deformation Region ◽  
Order Of Magnitude ◽  
Plastic Deformation Region ◽  
Fully Lamellar

Practical residual strain field around the microcrack tip of fully lamellar γ- TiAl alloy was estimate the by digital image correlation (DIC) technology with in-situ SEM observation. And the macro plastic deformation before fracture of such low ductility alloys was observed. The results showed that the size of plastic zone around microcrack tip was 2 ~ 10µ m which was much more smaller than the calculated value by fracture mechanics. During the magnified observation on the plastic deformation region, a series of microcracks were observed in the specimen without macro cracking. Furthermore, the size of distribution region of the microcracks were in the same order of magnitude with the calculated plastic zone near primary crack tip which just reflected the comprehensive effect of microcracks and the plastic deformation on the tips of them.

scholarly journals In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

2020 ◽  
pp. 1-14
Author(s):  
Michael Burtscher ◽  
Markus Alfreider ◽  
Klemens Schmuck ◽  
Helmut Clemens ◽  
Svea Mayer ◽  
...  
Keyword(s):  
Tial Alloy ◽  
Fully Lamellar

Abstract

The fracture mechanism of a fully lamellar γ-TiAl alloy through in-situ SEM observation

2000 ◽  
Vol 8 (12) ◽  
pp. 1443-1445 ◽  
Author(s):  
Y.H. Lu ◽  
Y.G. Zhang ◽  
L.J. Qiao ◽  
Y.B. Wang ◽  
C.Q. Chen ◽  
...  
Keyword(s):  
Fracture Mechanism ◽  
Tial Alloy ◽  
Sem Observation ◽  
Fully Lamellar

scholarly journals In Situ High-Energy X-ray Diffraction during Hot-Forming of a Multiphase TiAl Alloy

Metals ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2252-2265 ◽  
Author(s):  
Andreas Stark ◽  
Marcus Rackel ◽  
Aristide Tchouaha Tankoua ◽  
Michael Oehring ◽  
Norbert Schell ◽  
...  
Keyword(s):  
Tial Alloy ◽  
High Energy ◽  
Hot Forming ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760{degree}C

10.2172/46701 ◽  
1995 ◽  
Author(s):  
J.N. Wang ◽  
A.J. Schwartz ◽  
T.G. Nieh ◽  
C.T. Liu ◽  
V.K. Sikka ◽  
...  
Keyword(s):  
Tial Alloy ◽  
Two Phase ◽  
Fine Grained ◽  
Fully Lamellar

Ductile TiAl alloy with a Widmanstätten lamellar structure formed by rapid heating

2008 ◽  
Vol 23 (4) ◽  
pp. 949-953 ◽  
Author(s):  
J.P. Cui ◽  
M.L. Sui ◽  
Y.Y. Cui ◽  
D.X. Li
Keyword(s):  
Electric Current ◽  
Lamellar Structure ◽  
Tial Alloy ◽  
Rapid Heating ◽  
Pulse Treatment ◽  
Electric Current Pulse ◽  
Microstructural Refinement ◽  
Tial Alloys ◽  
Refinement Mechanism ◽  
Fully Lamellar

Instead of conventional grain-refinement treatments for improving the ductility of fully lamellar TiAl alloys, multiorientational, lamellar, subcolony refinement with good ductility has been achieved simply by using an electric-current pulse treatment. The microstructural refinement mechanism is attributed to the transformation on heating of γ laths in the prior large-grain lamellar structure to Widmanstätten α in several orientations, which on subsequent cooling forms lamellar structure colonies in multiple orientations. This kind of refined multiple-colony lamellar structure was found to enhance the ductility of the TiAl alloy.

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