The role of in-situ ceramic reinforcements on microstructure evolution and mechanical properties on developed hybrid Mg-MMCs

2020 ◽  
Vol 789 ◽  
pp. 139577 ◽  
Author(s):  
Harprabhjot Singh ◽  
Sanjeet Kumar ◽  
Deepak Kumar
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution

Microstructure Evolution and Compression Properties of a Directionally Solidified Ni-24.8%Nb Hypereutectic Alloy

2010 ◽  
Vol 654-656 ◽  
pp. 1351-1354
Author(s):  
Shuang Ming Li ◽  
Bing Lun Jiang ◽  
Heng Zhi Fu
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Growth Velocity ◽  
Thermal Gradient ◽  
Hypereutectic Alloy ◽  
Directionally Solidified ◽  
In Situ Composites ◽  
Compression Properties ◽  
Deformation Behaviors

At normal solidification conditions, in-situ composites of a Ni-24.8%Nb hypereutectic alloy can be produced at growth velocities below 5μm/s, with a thermal gradient of 180K/cm, and this low productivity remarkably restricts the application of this kind of in-situ composites. In this paper, we proposed an approach that employs an abrupt growth velocity to make the in-situ composites grow stably out of the coupled zone. In-situ composites of the Ni-24.8%Nb hypereutectic alloy were obtained at a growth velocity of 100μm/s and the productivity was greatly improved. This value is in the same order magnitude imposed on the single-crystal superalloys. The compression strengths were investigated on different microstructures involving the coupled eutectics and non-coupled eutectics. The results showed that the crack distribution and extension were mainly localized in primary Ni3Nb dendrites in the non-coupled eutectics, and that in-situ composites with the entirely coupled eutectics have improved mechanical properties and different deformation behaviors.

scholarly journals Microstructure Evolution and Mechanical Properties of Al-TiB2/TiC In Situ Aluminum-Based Composites during Accumulative Roll Bonding (ARB) Process

Materials ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 109 ◽  
Author(s):  
Jinfeng Nie ◽  
Fang Wang ◽  
Yusheng Li ◽  
Yang Cao ◽  
Xiangfa Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Accumulative Roll Bonding ◽  
Roll Bonding
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