scholarly journals Evaluation of Structural Stability for Long Span Beams Made of Low Grade Structural Steels (SS400, SM 400, SM 490) at High Temperatures

2017 ◽  
Author(s):  
In-Kyu Kwon
Keyword(s):  
Structural Stability ◽  
High Temperatures ◽  
Structural Steels ◽  
Low Grade ◽  
Long Span

Recrystallisation Resistance of Extruded and Cold Rolled Aluminium Alloys with Additions of Hf, Sc and Zr

2006 ◽  
Vol 519-521 ◽  
pp. 525-530 ◽  
Author(s):  
Håkon Hallem ◽  
W.J. Rittel ◽  
Børge Forbord ◽  
Knut Marthinsen
Keyword(s):  
Cold Rolling ◽  
Structural Stability ◽  
High Temperatures ◽  
High Resistance ◽  
Aluminium Alloys ◽  
Cold Rolled

A high recrystallisation resistance is required in aluminium alloys intended for processing or use at temperatures between 450°C-600°C. Additions of Hf, Sc and Zr significantly improve the resistance to recrystallisation through the formation of Al3X-dispersoids (X=Hf,Sc,Zr), and in this work different concentrations and combinations of these elements were added to five aluminium alloys. The alloys were extruded, subjected to various degrees of cold rolling (0%-80%) and finally annealed at high temperatures in order to study the structural stability. All variants displayed a high resistance towards recrystallisation, but the best results were obtained in the alloy containing only Sc and Zr. In this alloy no signs of recrystallisation were observed even after 1 hour annealing of extruded and 80% cold rolled profiles at 600°C.

Structural stability of a golden semiconducting orthorhombic polymorph of Ti2O3under high pressures and high temperatures

2010 ◽  
Vol 22 (37) ◽  
pp. 375402 ◽  
Author(s):  
Sergey V Ovsyannikov ◽  
Xiang Wu ◽  
Vladimir V Shchennikov ◽  
Alexander E Karkin ◽  
Natalia Dubrovinskaia ◽  
...  
Keyword(s):  
Structural Stability ◽  
High Temperatures ◽  
High Pressures
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