Microstructural Aspects of Creep Deformation in Two Phase Ceramics

1981 ◽  
pp. 307-315 ◽  
Author(s):  
D. R. Clarke
Keyword(s):  
Creep Deformation ◽  
Two Phase

Creep in Ordered Nickel Base Alloys

1984 ◽  
Vol 39 ◽  
Author(s):  
P. R. Strutt ◽  
B. H. Kear
Keyword(s):  
Creep Behavior ◽  
Creep Deformation ◽  
Crystallographic Orientation ◽  
Deformation Behavior ◽  
Strong Influence ◽  
Deformation Mode ◽  
Two Phase ◽  
Effects Of Temperature ◽  
Nickel Base ◽  
Relative Creep

ABSTRACTThis paper examines the fundamentals of deformation behavior in ordered y′ (Ni3Al), β (NiAl) and β′ (Ni2AITi) phases, and specific two phase y/y′ and B/B′ alloys. The relative creep strengths of these ordered nickel-base alloys are discussed. Differences in creep behavior are explained in terms of the effects of temperature, crystallographic orientation and alloying on creep deformation mode. In particular, it is shown that trace additions of boron and carbon to y/y′ alloys, or deviations from stoichiometry in β′ -type alloys can exert a strong influence on creep behavior.

Advances in Ambient Temperature Creep Deformation Behavior of Two-Phase Titanium Alloys

2005 ◽  
Vol 475-479 ◽  
pp. 779-784 ◽  
Author(s):  
A. Jaworski ◽  
Sreeramamurthy Ankem
Keyword(s):  
Titanium Alloys ◽  
Creep Deformation ◽  
Deformation Behavior ◽  
Creep Resistance ◽  
Volume Fraction ◽  
Beta Phase ◽  
Two Phase ◽  
Number Of Factors ◽  
Strength Difference ◽  
The Stability

In recent years, significant advances have been made in regard to the creep deformation behavior of two phase titanium alloys. It has been shown that the creep resistance depends on a number of factors, including the shape of the component phases, the strength difference between the phases, and the stability of the beta phase. For example, in two-phase materials with a similar volume fraction and morphology of phases, if the beta phase is less stable, then the creep resistance is lower. These developments will be reviewed and the reasons for such effects will be suggested.

The Creep Deformation and Elevated Temperature Microstructural Stability of a Two-Phase TiAl/Ti3Al Lamellar Alloy.

1994 ◽  
Vol 364 ◽  
Author(s):  
M. F. Bartholomeusz ◽  
J. A. Wert
Keyword(s):  
Elevated Temperature ◽  
Creep Rate ◽  
Microstructural Evolution ◽  
Creep Deformation ◽  
Minimum Creep Rate ◽  
Single Phase ◽  
Lamellar Microstructure ◽  
Microstructural Stability ◽  
Two Phase ◽  
The Individual

AbstractEnhanced work hardening of the phases in the lamellar microstructure has been cited as an explanation for the lower minimum creep rates of a two-phase TiAl/Ti3Al lamellar alloy compared with the minimum creep rates of the individual TiAl and Ti3Al single-phase alloys tested between 980 K and 1130 K. This proposition is confirmed by TEM observations. Thermal and thermomechanical exposure result in the microstructural evolution, which increases the minimum creep rate (εmin) of the lamellar alloy. The effect of microstructural evolution on εmin will be discussed in the present paper.

Creep Deformation of a Fully Lamellar Gamma Based Titanium Aluminide Alloy

1996 ◽  
Vol 460 ◽  
Author(s):  
F. Herrouin ◽  
P. Bowen ◽  
I. P. Jones
Keyword(s):  
Gas Turbine ◽  
Creep Deformation ◽  
Titanium Aluminide ◽  
Creep Resistance ◽  
Tial Alloy ◽  
Operating Conditions ◽  
Two Phase ◽  
Titanium Aluminide Alloy ◽  
Aero Engine ◽  
Fully Lamellar

ABSTRACTA complex two phase γ-TiAl alloy, Ti-47Al-lCr-1Mn-2Ta-0.2Si (at.%) in a fully lamellar condition, has been creep tested at a stress of 200MPa and a temperature of 700°C. This simulates the in-service operating conditions for several potential gas turbine aero engine applications where creep resistance is a design limiting material property. The results have indicate that reduction in lamellae thickness and avoidance of feathery type microstructures contribute to improved creep resistance.

Creep deformation of a two-phase lamellar alloy and the individual TiAl and Ti3Al constituent phases

1993 ◽  
Vol 29 (3) ◽  
pp. 389-394 ◽  
Author(s):  
Michael F. Bartholomeusz ◽  
Qibin Yang ◽  
John A. Wert
Keyword(s):  
Creep Deformation ◽  
Two Phase ◽  
The Individual

Creep deformation of ductile two-phase alloys

1991 ◽  
Vol 39 (7) ◽  
pp. 1549-1554 ◽  
Author(s):  
M. Tanaka ◽  
T. Sakaki ◽  
H. Iizuka
Keyword(s):  
Creep Deformation ◽  
Two Phase
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