Effect of In Situ Nano-Particles on the Microstructure and Mechanical Properties of Ferritic Steel

2016 ◽  
Vol 87 (11) ◽  
pp. 1389-1394 ◽  
Author(s):  
Yawei Niu ◽  
Hao Tang ◽  
Yanlin Wang ◽  
Xiaohua Chen ◽  
Zidong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ferritic Steel ◽  
Nano Particles ◽  
Microstructure And Mechanical Properties

Microstructure and Mechanical Properties of In Situ Cast Aluminum Based Composites Reinforced with TiC Nano-Particles

2020 ◽  
Vol 985 ◽  
pp. 211-217
Author(s):  
Wojciech Maziarz ◽  
Piotr Bobrowski ◽  
Anna Wójcik ◽  
Agnieszka Bigos ◽  
Łukasz Szymański ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Coefficient Of Thermal Expansion ◽  
Nano Particles ◽  
Cast Aluminum ◽  
Casting Method ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron ◽  
Cast Composites ◽  
In Situ Formation

This work concerns microstructure and mechanical properties investigations of aluminum based composite strengthened with the TiC particles being in nanometer size. The composites were fabricated by the casting method combined with in-situ formation of TiC particles. Applying a suitable composition of components and moderators of SHS reaction which occur during casting, it was possible to cast the samples with TiC particles of size of 150 nm and faceted shape. Microstructure investigations using scanning and transmission electron microscopy (SEM and TEM) allowed to identified the distribution of TiC particles and their preferred location in the microstructure of composites. Also the additional precipitates with different size and shape were identified in investigated samples. Significant increase of strength was observed in in-situ cast composites in comparison to Al-1000 alloy mainly due mainly due to coefficient of thermal expansion and elastic modulus mismatch between the reinforcements and the metal matrix, Hall-Pecht relation and also in minority the Orowan effect.

A novel in-situ exothermic assisted sintering high entropy Al2O3/(NbTaMoW)C composites: Microstructure and mechanical properties

2021 ◽  
Vol 212 ◽  
pp. 108681
Author(s):  
Diqiang Liu ◽  
Aijun Zhang ◽  
Jiangang Jia ◽  
Jiesheng Han ◽  
Junyan Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Entropy ◽  
Microstructure And Mechanical Properties

scholarly journals Effect of Sintering Temperature on Microstructure and Mechanical Properties of Hot-Pressed Fe/FeAl2O4 Composite

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 422
Author(s):  
Kuai Zhang ◽  
Yungang Li ◽  
Hongyan Yan ◽  
Chuang Wang ◽  
Hui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Hot Press ◽  
Microstructure And Mechanical Properties ◽  
Powder Particles ◽  
Hot Press Sintering ◽  
Sintering Method

An Fe/FeAl2O4 composite was prepared with Fe-Fe2O3-Al2O3 powder by a hot press sintering method. The mass ratio was 6:1:2, sintering pressure was 30 MPa, and holding time was 120 min. The raw materials for the powder particles were respectively 1 µm (Fe), 0.5 µm (Fe2O3), and 1 µm (Al2O3) in diameter. The effect of sintering temperature on the microstructure and mechanical properties of Fe/FeAl2O4 composite was studied. The results showed that Fe/FeAl2O4 composite was formed by in situ reaction at 1300 °C–1500 °C. With the increased sintering temperature, the microstructure and mechanical properties of the Fe/FeAl2O4 composite showed a change law that initially became better and then became worse. The best microstructure and optimal mechanical properties were obtained at 1400 °C. At this temperature, the grain size of Fe and FeAl2O4 phases in Fe/FeAl2O4 composite was uniform, the relative density was 96.7%, and the Vickers hardness and bending strength were 1.88 GPa and 280.0 MPa, respectively. The wettability between Fe and FeAl2O4 was enhanced with increased sintering temperature. And then the densification process was accelerated. Finally, the microstructure and mechanical properties of the Fe/FeAl2O4 composite were improved.

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