Constitutive modeling of creep behavior in single crystal superalloys: Effects of rafting at high temperatures

2015 ◽  
Vol 644 ◽  
pp. 225-233 ◽  
Author(s):  
Ya-Nan Fan ◽  
Hui-Ji Shi ◽  
Wen-Hui Qiu
Keyword(s):  
Single Crystal ◽  
High Temperatures ◽  
Creep Behavior ◽  
Constitutive Modeling

Orientation Dependent Strength and Cross-Slip Structure of Ordinary Dislocations in Single Crystal γ-Ti-56A1

1998 ◽  
Vol 552 ◽  
Author(s):  
Q. Feng ◽  
S. H.
Keyword(s):  
Single Crystal ◽  
High Temperatures ◽  
Slip Plane ◽  
Forward Direction ◽  
Orientation Dependence ◽  
Cross Slip ◽  
Dislocation Loops ◽  
Single Slip ◽  
Anomalous Hardening ◽  
Double Cross

ABSTRACTThe temperature as well as orientation dependence in anomalous hardening occurs in single crystal Ti-56AI between 673K and 1073K under single slip of ordinary dislocations. The ordinary dislocations (1/2<110]) are gliding not only on (111) plane but also on (110) plane in the temperature range where the anomalous hardening occurs in single crystal Ti-56A1. The TEM study shows that the (110) cross-slip of ordinary dislocations is a double cross-slip in nature in which first, the dislocations cross-slip from the primary (111) slip plane to (110) plane followed by cross-slipping again onto another primary slip plane. This double cross-slip leaves a pair of edge segments 'superjogs' in (110) planes. It appears that these superjogs are immobile in the forward direction and act as pinning points. Furthermore, these pinning points would act as a Frank-Read source for the double cross-slipped dislocations, which generate dislocation loops as well as dislocation dipoles. The pinning structure, multiplane dislocation loops, and dipoles of double cross-slip origin all contribute to anomalous hardening at high temperatures in this material.

Enhancing Delta E Effect at High Temperatures of Galfenol/Ti/Single-Crystal Diamond Resonators for Magnetic Sensing

2020 ◽  
Vol 12 (20) ◽  
pp. 23155-23164 ◽  
Author(s):  
Zilong Zhang ◽  
Haihua Wu ◽  
Liwen Sang ◽  
Yukiko Takahashi ◽  
Jian Huang ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Temperatures ◽  
Magnetic Sensing ◽  
Single Crystal Diamond
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