The relaxation behaviour of strenght and fracture toughness of amorphous metal‐metalloid alloys | Zendy

Wetzig K. | Zendy; Pompe W. | Zendy; Fiedler H. | Zendy; Aljochin V. P. | Zendy

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The relaxation behaviour of strenght and fracture toughness of amorphous metal‐metalloid alloys

Author(s) -

Wetzig K.,

Pompe W.,

Fiedler H.,

Aljochin V. P.

Publication year - 1983

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.2170180921

Subject(s) - materials science , annealing (glass) , fracture toughness , ultimate tensile strength , impurity , amorphous metal , composite material , amorphous solid , indentation hardness , toughness , deformation (meteorology) , metallurgy , microstructure , crystallography , chemistry , organic chemistry , alloy

The effect of an annealing treatment on crack and fracture kinetics and on mechanical properties of Fe 40 Ni 40 P 10 B 6 and Fe 5 Co 70 Si 15 B 10 amorphous ribbons — both pure and with defined impurities — was investigated by in‐situ tensile experiments in SEM. The effect of relaxation processes on tensile strength, microhardness and fracture toughness was analysed. A result of technological interest is the increase of fracture toughness after an annealing treatment in the temperature range T ann. = (0.55 … 0.6) · T cryst. . This effect will be enhanced by defined chemical impurities, and it can be well interpreted by a model of fracture toughness variation during a temper process. In this model the deformation behaviour cannot be described within the scope of a homogeneous solid, but it is determined by a relationship between closely localized deformation instabilities.

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