Publication Date:
2018-08-17
Description:
A first-principles investigation on the rupture strength W 0 of γ -Ni/ γ '-Ni 3 Al interfaces with and without P-doping is conducted, and the influence of phosphorous content x on W 0 is also evaluated. The results show P prefers to occupy Ni sublattices at the side of γ -phases rather than octahedral interstitial centers in γ and γ ' phases. The advantages and adverse effects of phosphorous mainly depend on their inter-phase fracture sites related to doping types. With the increase of P content x , the Griffith rupture work W of Ni/Ni 3 Al interfaces firstly decreases and then increases, and a minimum appears at x =0.018 wt.%. This good agreement with the x dependence of ultimate tensile strengths of IN718 superalloys indicates the W 0 can be applied to characterize the tensile strength of Ni-based superalloys to some extent. The analysis of ele...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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