Effect of annealing on microstructure and mechanical properties of bulk nanocrystalline Fe3Al alloy with 5wt.% Cu prepared by aluminothermic reaction

2011 ◽  
Vol 528 (24) ◽  
pp. 7140-7148 ◽  
Author(s):  
Peiqing La ◽  
Yupeng Wei ◽  
Yang Yang ◽  
Yaping Bai ◽  
Xuefeng Lu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminothermic Reaction ◽  
Microstructure And Mechanical Properties ◽  
Bulk Nanocrystalline ◽  
Fe3al Alloy

Effects of Annealing on Microstructure and Mechanical Properties of Bulk Nanocrystalline Fe3Al Based Alloy with 10 Wt. % Mn Prepared by Aluminothermic Reaction

2011 ◽  
Vol 236-238 ◽  
pp. 1939-1944
Author(s):  
Pei Qing La ◽  
Xin Guo ◽  
Yang Yang ◽  
Chun Jie Cheng ◽  
Xue Feng Lu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mechanical Properties ◽  
Grain Size ◽  
Room Temperature ◽  
Annealed Alloy ◽  
Creep Properties ◽  
Aluminothermic Reaction ◽  
Microstructure And Mechanical Properties ◽  
Bulk Nanocrystalline ◽  
Hot Rolled

Microstructure and mechanical properties of bulk nanocrystalline Fe3Al based alloy with 10 wt. % Mn prepared by aluminothermic reaction after annealing at 600, 800 and 1000°C for 8 h were investigated in order to gain insights in effects of annealing. Crystal structure of the alloy did not change and a fiber phase with enriched Mn appeared in the annealed alloy. Grain size of the alloy changed a little after annealing at 600°C but increased a lot after annealing at 800 and 1000°C. The annealed alloy had plasticity in compression at room temperature and the alloy annealed at 1000°C had yield strength of 782 MPa. The alloy without annealing has creep properties in compression at 800 and 1000°C and can be easily hot rolled to strip and sheet.

Effects of Annealing on Microstructure and Mechanical Properties of Bulk Nanocrystalline Fe3Al Based Alloy Prepared by Aluminothermic Reaction

2011 ◽  
Vol 688 ◽  
pp. 57-61 ◽  
Author(s):  
Pei Qing La ◽  
Xue Feng Lu ◽  
Yang Yang ◽  
Ya Ping Bai ◽  
Yu Peng Wei
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Creep Property ◽  
Compressive Yield Strength ◽  
Large Plastic Deformation ◽  
Grain Sizes ◽  
Aluminothermic Reaction ◽  
Microstructure And Mechanical Properties ◽  
Different Temperatures ◽  
Bulk Nanocrystalline

The effects of annealing on microstructure and mechanical properties of bulk nanocrystalline Fe3Al based alloy with 10 wt. % Ni prepared by aluminothermic reaction have been investigated. It was found that crystal structure of the alloy did not change after annealing at 600 and 800 °C, while it changed to ordered B2and nanocrystalline grains orientations became random after annealing at 1000 °C. Average grain sizes of the alloy changed a little after annealing at different temperatures. The alloy after annealing had a large plastic deformation in compression at room temperature and the alloy annealed at 800 °C had the highest compressive yield strength of 1351 MPa. The alloy without annealing had much lower flow stress and good creep property in compression at 800 and 1000°C.

Bimodal Microstructure and Mechanical Properties of Cryomilled Nanocrystalline Al-7.5Mg

2002 ◽  
Vol 740 ◽  
Author(s):  
Zonghoon Lee ◽  
David B. Witkin ◽  
Enrique J. Lavernia ◽  
Steven R. Nutt
Keyword(s):  
Mechanical Properties ◽  
Hot Isostatic Pressing ◽  
Tensile Behavior ◽  
Deformation Mechanisms ◽  
Coarse Grained ◽  
Nanocrystalline Powders ◽  
Coarse Grain ◽  
Microstructure And Mechanical Properties ◽  
Bulk Nanocrystalline ◽  
Extensive Plastic Deformation

ABSTRACTThe microstructure and mechanical properties consisting of tensile behavior and hardness of bulk nanocrystalline Al-7.5Mg alloy were investigated. Grain refinement was achieved by cryomilling of atomized Al-7.5Mg powders, and then nanocrystalline powders blended with 15% and 30% coarse-grained Al-7.5Mg powders were consolidated by hot isostatic pressing (HIP) followed by extrusion to produce bulk nanocrystalline Al-7.5Mg alloys. Bimodal structures, which enhance ductility and toughness of nanocrystalline metals, were produced that consisted of nanocrystalline grains and elongated coarse-grain bands. Examination of indentation revealed unusual deformation mechanisms and interactions between the coarse-grain bands and nanocrystalline regions. The ductile coarse-grain bands underwent extensive plastic deformation near indentation, while nanocrystalline regions exhibited limited deformation.

Effect of Sintering Temperature on Microstructure and Mechanical Properties of Nanocrystalline Aluminum 5083 Alloy

2015 ◽  
Vol 782 ◽  
pp. 113-118
Author(s):  
Ying Mei Teng ◽  
Zhao Hui Zhang ◽  
Zi Zhou Yuan
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Compressive Strength ◽  
Sintering Temperature ◽  
Initial Pressure ◽  
Fine Grain ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Bulk Nanocrystalline

The bulk nanocrystalline (NC) aluminum (Al) 5083 was synthesized by spark plasma sintering (SPS) technique with low initial pressure of 1 MPa, high holding pressure of 300 MPa and holding time of 4 min at different sintering temperatures, using surface passivated nanopowders. The effect of sintering temperature on microstructure and mechanical properties of the bulk NC Al 5083 were investigated. Results indicate that the density, grain size, the hardness and the compressive strength of the bulk NC Al 5083 increase with an increase in sintering temperature. The mechanical properties of the material are greatly improved due to the fine grain size. The bulk NC Al 5083 sintered at 723 K has the highest micro-hardness of 2.37 GPa and the best compressive strength of 845 MPa.

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