Elevated temperature compression behaviors of lotus-type porous NiAl

Autor:	Soong-Keun Hyun, Myoung-Gyun Kim, Mok-Soon Kim, Takuya Ide, Ji-Woon Lee, Hideo Nakajima
Rok vydání:	2012
Předmět:	Toughness Nial Materials science Mechanical Engineering Metallurgy Metals and Alloys General Chemistry Crystal structure Compression (physics) Brittleness Mechanics of Materials Materials Chemistry Composite material Porous medium Porosity Anisotropy computer computer.programming_language
Zdroj:	Intermetallics. 29:27-34
ISSN:	0966-9795
DOI:	10.1016/j.intermet.2012.04.010
Popis:	A compression test was conducted on lotus-type porous NiAl to investigate the effect of cylindrical pores on the compression behaviors of the brittle material at elevated temperature. Lotus-type porous NiAl was fabricated by unidirectional solidification in the pressurized hydrogen atmosphere. The deformation strain of porous NiAl was larger than that of nonporous NiAl at 673 K. Both porous and nonporous NiAl showed ductile behavior at 873 K. The cylindrical pores affected the movement of cracks and dislocations in the material, and these contributed to the increased toughness of the brittle material. Anisotropic compression was caused by the difference between aligned directions of cylindrical pores and the inherent anisotropy of the matrix that originates from the crystal structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::60bc63117fc0cda55db0cd27e4280114 https://doi.org/10.1016/j.intermet.2012.04.010 Zobrazit plný text záznamu Full Text from ScienceDirect