Microstructure evolution and mechanical behavior of as-cast, heat treated and directionally solidified Fe–15Al–10Nb alloys

2014 ◽  
Vol 55 ◽  
pp. 129-137 ◽  
Author(s):  
Guang Yang ◽  
Srdjan Milenkovic
Keyword(s):  
Mechanical Behavior ◽  
Microstructure Evolution ◽  
Directionally Solidified ◽  
Heat Treated

Effect of growth rate on microstructure and microstructure evolution of directionally solidified Nb-Si alloys

2008 ◽  
Vol 1128 ◽  
Author(s):  
Yoshihito Sekito ◽  
Seiji Miura ◽  
Kenji Ohkubo ◽  
Tetsuo Mohri ◽  
Norihito Sakaguchi ◽  
...  
Keyword(s):  
Growth Rate ◽  
Orientation Relationship ◽  
Microstructure Evolution ◽  
Crystallographic Orientation ◽  
Floating Zone ◽  
Directionally Solidified ◽  
Solidification Direction ◽  
Arc Melting ◽  
Heat Treated ◽  
Crystallographic Orientation Relationship

AbstractIn the present work, Nb-18.1Si-1.5Zr alloy rods are produced with a growth rate ranging from 1.5 to about 1500 mm/h using the optical floating zone (OFZ) furnace. A part of each specimen is heat-treated at 1650 oC for 100 h. The microstructure was observed using SEM and TEM and analyzed using EPMA and EBSD.Eutectic-cells are observed in as-grown specimens with a growth rate of 150 mm/h or higher. It is found by EBSD analysis that the solidification direction of Nb is along <113> and that of Nb3Si is along <001], and {112} of Nb and {110) of Nb3Si are parallel. The present crystallographic orientation relationship between Nb and Nb3Si is different from that found in previous reports by several researchers. It was also confirmed that the heat-treated microstructure in the specimen grown by OFZ with a growth rate of 150 mm/h is similar to that in the heattreated specimen prepared by arc-melting.

scholarly journals Influence of carbon on the mechanical behavior and microstructure evolution of CoCrFeMnNi processed by high pressure torsion

Materialia ◽  
2021 ◽  
Vol 16 ◽  
pp. 101059
Author(s):  
Yemao Lu ◽  
Andrey Mazilkin ◽  
Torben Boll ◽  
Nikita Stepanov ◽  
Sergei Zherebtzov ◽  
...  
Keyword(s):  
High Pressure ◽  
Mechanical Behavior ◽  
Microstructure Evolution ◽  
High Pressure Torsion

scholarly journals Mechanical behavior and microstructure evolution during deformation of AA7075-T651

2021 ◽  
pp. 141615
Author(s):  
Biswajit Dalai ◽  
Marie Anna Moretti ◽  
Paul Åkerström ◽  
Corinne Arvieu ◽  
Dimitri Jacquin ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Microstructure Evolution

The role of texturing and microstructure evolution on the tensile behavior of heat-treated Inconel 625 produced via laser powder bed fusion

2020 ◽  
Vol 769 ◽  
pp. 138500 ◽  
Author(s):  
Giulio Marchese ◽  
Simone Parizia ◽  
Masoud Rashidi ◽  
Abdollah Saboori ◽  
Diego Manfredi ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Tensile Behavior ◽  
Inconel 625 ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Heat Treated

scholarly journals Austenite Reverse Transformation in a Q&P Route of Mn and Ni Added Steels

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 862 ◽  
Author(s):  
Maribel Arribas ◽  
Teresa Gutiérrez ◽  
Eider Del Molino ◽  
Artem Arlazarov ◽  
Irene De Diego-Calderón ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Microstructural Characterization ◽  
Carbon Steels ◽  
Reverse Transformation ◽  
Low Carbon ◽  
Effective Mechanism ◽  
Low Carbon Steels ◽  
Heat Treated ◽  
Final Microstructure

In this work, four low carbon steels with different contents of Mn and Ni were heat treated by quenching and partitioning (Q&P) cycles where high partitioning temperatures, in the range of 550 °C–650 °C, were applied. In order to elucidate the effect of applying these high partitioning temperatures with respect to more common Q&P cycles, the materials were also heat treated considering a partitioning temperature of 400 °C. The microstructure evolution during the Q&P cycles was studied by means of dilatometry tests. The microstructural characterization of the treated materials revealed that austenite retention strongly depended on the alloy content and partitioning conditions. It was shown that the occurrence of austenite reverse transformation (ART) in the partitioning stage in some of the alloys and conditions was a very effective mechanism to increase the austenite content in the final microstructure. However, the enhancement of tensile properties achieved by the application of high partitioning temperature cycles was not significant.

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