کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1647297 | 1517313 | 2012 | 4 صفحه PDF | دانلود رایگان |

Compression tests were carried out for lotus-type porous NiAl at room temperature to verify its compressive properties when the structure of the material was controlled to ensure the existence of pores. The lotus-type porous NiAl was fabricated by unidirectional solidification in a pressurized hydrogen atmosphere. The results of the compression tests showed that the toughness of the porous NiAl was increased relative to that of the nonporous specimens. The cylindrical pores contributed to the toughening of the porous specimens by blunting crack tip and multi-cracking at pores. The difference between the aligned directions of the cylindrical pores caused the mechanical anisotropy of the specimens between different solidification directions to the compressive directions.
► Ductility of NiAl increases by unidirectional pores.
► Crack tip blunting and multi-cracking are suggested for toughening of NiAl.
► Mechanical anisotropy is caused from pore morphology and crystal structure.
Journal: Materials Letters - Volume 74, 1 May 2012, Pages 213–216