Growth of poly- and single-crystal ScN on MgO(001): Role of low-energy N2+ irradiation in determining texture, microstructure evolution, and mechanical properties

1998 ◽  
Vol 84 (11) ◽  
pp. 6034-6041 ◽  
Author(s):  
D. Gall ◽  
I. Petrov ◽  
N. Hellgren ◽  
L. Hultman ◽  
J. E. Sundgren ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Microstructure Evolution ◽  
Low Energy

The Role of Friction Stir Welding Process Parameter on Mechanical Properties of Magnesium Alloy AZ31B

2013 ◽  
Vol 849 ◽  
pp. 38-44
Author(s):  
S. Vijayan ◽  
S. Prasath
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Microstructure Evolution ◽  
Welding Process ◽  
High Strength ◽  
Fusion Welding ◽  
Friction Stir ◽  
Current State ◽  
Magnesium Alloy Az31b

The Friction Stir welding is a solid state welding invented in the year 1991.This welding technique is highly energy efficient, eco-friendly in joining the high strength aerospace aluminums alloys and its other alloys which are not able to weld by the conventional fusion welding process. Initially FSW is use to weld aluminums alloys and gradually it applies to all form of metals and alloys. In this review article the current state of understanding and development of FSW with respect to Magnesium alloys AZ 31 B is addressed. And particular emphasis is given to the effect of FSW process parameters on the mechanical properties, corrosion behavior and microstructure evolution. At this stage there is wide gap in understanding the mechanism of dissimilar Magnesium welds on microstructure evolution and microstructure property relationships with respect to FSW and Submersible FSW process.

scholarly journals Predicting size effects in nickel-base single crystal superalloys with the Discrete-Continuous Model

2010 ◽  
pp. 65-76
Author(s):  
Aurélien Vattré ◽  
Benoit Devincre ◽  
Arjen Roos ◽  
Frédéric Feyel
Keyword(s):  
Mechanical Properties ◽  
Flow Stress ◽  
Finite Elements ◽  
Single Crystal ◽  
Size Effects ◽  
Continuous Model ◽  
Dislocation Dynamics ◽  
Formation And Evolution ◽  
Nickel Base

The Discrete-Continuous Model, a coupling between dislocation dynamics and finite elements simulations, is used for modelling size effects in the mechanical properties of single-crystal superalloys. Both formation and evolution of the dislocation microstructures are analysed, and the crucial role of the storage of signed dislocations at the interfaces is discussed. The onset of plasticity is found to scale as the inverse of the channel width, and polarised dislocation networks at the interfaces significantly increase the flow stress with respect to a bulk crystal.

scholarly journals Effect of Deformation Temperature on Microstructure Evolution and Mechanical Properties of Low-Carbon High-Mn Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Adam Grajcar ◽  
Aleksandra Kozłowska ◽  
Santina Topolska ◽  
Mateusz Morawiec
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Deformation Temperature ◽  
Testing Temperature ◽  
Dislocation Slip ◽  
Low Carbon ◽  
Car Crash ◽  
Mn Steel ◽  
High Manganese Austenitic Steel

This work addresses the influence of deformation temperature in a range from −40°C to 200°C on the microstructure evolution and mechanical properties of a low-carbon high-manganese austenitic steel. The temperature range was chosen to cope at the time during sheet processing or car crash events. Experimental results show that yield stress and ultimate tensile strength gradually deteriorate with an increase in the tensile testing temperature. The dominant mechanism responsible for the strain hardening of steel changes as a function of deformation temperature, which is related to stacking fault energy (SFE) changes. When the deformation temperature rises, twinning decreases while a role of dislocation slip increases.

Mechanical Properties and Dislocation Structure of Single Crystal Cdte Deformed in Compression at 300°C

1976 ◽  
Vol 34 ◽  
pp. 592-593
Author(s):  
Ernest L. Hall ◽  
J. B. Vander Sande
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Dislocation Structure ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Strain Curve ◽  
Optical Devices ◽  
Semiconductor Compound ◽  
Wide Range ◽  
Sample Orientation

The present paper describes research on the mechanical properties and related dislocation structure of CdTe, a II-VI semiconductor compound with a wide range of uses in electrical and optical devices. At room temperature CdTe exhibits little plasticity and at the same time relatively low strength and hardness. The mechanical behavior of CdTe was examined at elevated temperatures with the goal of understanding plastic flow in this material and eventually improving the room temperature properties. Several samples of single crystal CdTe of identical size and crystallographic orientation were deformed in compression at 300°C to various levels of total strain. A resolved shear stress vs. compressive glide strain curve (Figure la) was derived from the results of the tests and the knowledge of the sample orientation.

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