A surface measurement study of grain-boundary sliding during creep of a two-phase, copper-cobalt alloy

1977 ◽  
Vol 29 (3) ◽  
pp. 219-225 ◽  
Author(s):  
J.D. Parker ◽  
B. Wilshire
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Surface Measurement ◽  
Cobalt Alloy ◽  
Two Phase ◽  
Measurement Study ◽  
Boundary Sliding

Deformation Behavior of Ti-6Al-4V and Ti-6.85Al-1.6V Alloy with a Globular Microstructure

2005 ◽  
Vol 475-479 ◽  
pp. 2965-2968 ◽  
Author(s):  
Jeoung Han Kim ◽  
S. Lee Semiatin ◽  
Chong Soo Lee
Keyword(s):  
Grain Boundary ◽  
Inelastic Deformation ◽  
Deformation Theory ◽  
Grain Boundary Sliding ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Junction Region ◽  
Two Phase ◽  
Dislocation Glide ◽  
Boundary Sliding

The high temperature deformation mechanisms of two phase a+b alloy and a near-a alloy were investigated, and compared within the framework of inelastic-deformation theory. For this purpose, load-relaxation tests were conducted on the two alloys at temperatures of 750~900°C. The flow stress-vs.-strain rate curves for both alloys were well fit with inelastic deformation equations describing dislocation glide and grain boundary sliding. The amount of grain boundary sliding resistance was higher in the near-a alloy rather than the two phase a+b alloy due to difficulty in stress relaxation at triple junction region.

Atomic simulation of grain boundary sliding in Co/Cu two-phase bicrystals

2010 ◽  
Vol 527 (10-11) ◽  
pp. 2629-2636 ◽  
Author(s):  
Motohiro Yuasa ◽  
Takumi Nakazawa ◽  
Mamoru Mabuchi
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Two Phase ◽  
Atomic Simulation ◽  
Boundary Sliding

scholarly journals Stereographic Analysis of Grain Boundary Sliding in Superplastic Deformation of Alumina-Zirconia Two Phase Ceramics

1999 ◽  
Vol 63 (3) ◽  
pp. 333-340 ◽  
Author(s):  
Satoru Ishihara ◽  
Tsuneyuki Tanizawa ◽  
Koutarou Akashiro ◽  
Norio Furushiro ◽  
Shigenori Hori
Keyword(s):  
Grain Boundary ◽  
Superplastic Deformation ◽  
Grain Boundary Sliding ◽  
Two Phase ◽  
Boundary Sliding

scholarly journals Stereographic Analysis of Grain Boundary Sliding in Superplastic Deformation of Alumina-Zirconia Two Phase Ceramics

1999 ◽  
Vol 40 (10) ◽  
pp. 1158-1165 ◽  
Author(s):  
Satoru Ishihara ◽  
Tsuneyuki Tanizawa ◽  
Koutarou Akashiro ◽  
Norio Furushiro ◽  
Shigenori Hori
Keyword(s):  
Grain Boundary ◽  
Superplastic Deformation ◽  
Grain Boundary Sliding ◽  
Two Phase ◽  
Boundary Sliding

Examination of Fracture Interfaces in Silicon Nitride

1975 ◽  
Vol 33 ◽  
pp. 60-61
Author(s):  
Nancy J. Tighe
Keyword(s):  
Silicon Nitride ◽  
Grain Boundary ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Slow Crack Growth ◽  
Ceramic Materials ◽  
Grain Boundary Sliding ◽  
Boundary Phase ◽  
Turbine Engines ◽  
Boundary Sliding

Silicon nitride is one of the ceramic materials being considered for the components in gas turbine engines which will be exposed to temperatures of 1000 to 1400°C. Test specimens from hot-pressed billets exhibit flexural strengths of approximately 50 MN/m2 at 1000°C. However, the strength degrades rapidly to less than 20 MN/m2 at 1400°C. The strength degradition is attributed to subcritical crack growth phenomena evidenced by a stress rate dependence of the flexural strength and the stress intensity factor. This phenomena is termed slow crack growth and is associated with the onset of plastic deformation at the crack tip. Lange attributed the subcritical crack growth tb a glassy silicate grain boundary phase which decreased in viscosity with increased temperature and permitted a form of grain boundary sliding to occur.

INTERNAL FRICTION PEAKS CONNECTED WITH GRAIN BOUNDARY SLIDING IN Al

1983 ◽  
Vol 44 (C9) ◽  
pp. C9-759-C9-764
Author(s):  
E. Bonetti ◽  
A. Cavallini ◽  
E. Evangelista ◽  
P. Gondi
Keyword(s):  
Internal Friction ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding
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