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Erschienen in: Advances in Manufacturing 2/2019

07.05.2019

Effects of boron content on environmental embrittlement of ordered Ni3Fe alloys

verfasst von: Tao Chen, Ye-Xin Chen, Biao Yang, Teng Wang

Erschienen in: Advances in Manufacturing | Ausgabe 2/2019

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Abstract

The effects of boron content (CB = 0–0.14% (mass fraction)) on the tensile properties and environmental embrittlement of ordered Ni-24%Fe (atom fraction)-B (Ni3Fe-B) alloys have been investigated using tensile tests in vacuum and under gaseous hydrogen. The results indicate that, when CB < 0.06% (mass fraction), the tensile strength and elongation of the alloys in vacuum and gaseous hydrogen increase as CB in the ordered Ni3Fe-B alloy increases. The tensile strength and elongation are maximum, and the hydrogen embrittlement factor (IH) is minimum for the ordered Ni3Fe-0.06%B (mass fraction) alloy. Compared with the ordered B-free Ni3Fe alloy, IH of the ordered Ni3Fe-0.06%B (mass fraction) alloy decreases by 98.1%, and the fracture morphology of the alloy changes from fully intergranular to fully transgranular, when tested in gaseous hydrogen. A critical level of boron segregation at the grain boundaries of ordered Ni3Fe-B alloys is observed. The hydrogen embrittlement of ordered Ni3Fe-B alloys in gaseous hydrogen can be completely suppressed by boron atoms when CB \(\geqslant\) 0.06% (mass fraction).

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Metadaten
Titel
Effects of boron content on environmental embrittlement of ordered Ni3Fe alloys
verfasst von
Tao Chen
Ye-Xin Chen
Biao Yang
Teng Wang
Publikationsdatum
07.05.2019
Verlag
Shanghai University
Erschienen in
Advances in Manufacturing / Ausgabe 2/2019
Print ISSN: 2095-3127
Elektronische ISSN: 2195-3597
DOI
https://doi.org/10.1007/s40436-019-00255-4

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