scholarly journals The Influence of Reheating Temperature and Direct-cooling Rate after Forging on Microstructure and Mechanical Properties of V-microalloyed Steel 38MnSiVS5

2006 ◽  
Vol 46 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Ghasem Dini ◽  
Mahmood Monir Vaghefi ◽  
Ali Shafyei
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Microalloyed Steel ◽  
Microstructure And Mechanical Properties

scholarly journals Effects of the Nanostructured Fe-V-Nb Modificators on the Microstructure and Mechanical Properties of Si-Mn Steel

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Tiebao Wang ◽  
Chunxiang Cui ◽  
Kuo Jia ◽  
Lichen Zhao
Keyword(s):  
Mechanical Properties ◽  
Microalloyed Steel ◽  
Fracture Morphology ◽  
Rapid Quenching ◽  
Tem Analysis ◽  
Nanoscale Particles ◽  
Microstructure And Mechanical Properties ◽  
Nucleation Sites ◽  
Mn Steel ◽  
Better Than

The nanostructured Fe-V-Nb master alloy was prepared in vacuum rapid quenching furnace and then was added in the steel melts as modificators before casting. Next, the effects of the nanostructured Fe-V-Nb modificators on the microstructure and mechanical properties of the steel were studied. The results show that the grain size of the steel has been effectively refined, which is mainly because the dispersed nanoscale particles can produce more nucleation sites during the solidification of the liquid steel. Tensile properties and fracture morphology reveal that the yield strength and toughness of the steel modified by nanostructured Fe-V-Nb modificators are better than that of the microalloyed steel. TEM analysis shows that vanadium and niobium in the modificators exist in the form of (V, Nb) C which effectively increases the nucleation rate and leads to better mechanical properties of the steel.

scholarly journals Effect of Cooling Rate and Ti Addition on the Microstructure and Mechanical Properties in As-cast Condition of Hypereutectic High Chromium Cast Irons

2012 ◽  
Vol 52 (12) ◽  
pp. 2210-2219 ◽  
Author(s):  
Qiang Liu ◽  
Hongwei Zhang ◽  
Qiang Wang ◽  
Xiangkui Zhou ◽  
P^|^auml;r G. J^|^ouml;nsson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Cast Irons ◽  
High Chromium ◽  
Microstructure And Mechanical Properties ◽  
Cast Condition ◽  
Ti Addition

Microstructure and Mechanical Properties of Al-12.6%Si Composite Reinforced by Al63Cu25Fe12Quasicrystal

2012 ◽  
Vol 182-183 ◽  
pp. 162-166
Author(s):  
Can Can Li ◽  
Hao Ran Geng ◽  
Zhen Yuan Li ◽  
Hai Ou Qin
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cooling Rate ◽  
Quasicrystalline Phase ◽  
Melt Temperature ◽  
Microstructure And Mechanical Properties

In this paper, Al-12.6%Si/Al63Cu25Fe12 composites were fabricated by method of casting. The microstructure and chemical composition of Al63Cu25Fe12 quasicrystal alloy and Al-12.6%Si alloy reinforced by the quasicrystal were studied, and the mechanical properties of Al-12.6%Si composite were also measured. The results show that almost single quasicrystalline phases exist in the samples which are cast with the 1300°C melt. Quickly enough cooling rate and appropriate melt temperature are necessary for the formation of the quasicrystalline phase. In addition, Al-12.6%Si composite has optimal mechanical properties when the amount of Al63Cu25Fe12 quasicrystal is 3 wt%.

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