Properties and structure of alloy 1440 in relation to composition and heat treatment schedules
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Slabs of alloy 1440 after aging by both schedules are better than slabs of alloy 1163 with respect to low-cycle fatigue by 20–50%, and also with respect to fatigue crack growth rate with low stress intensity factors.
Alloy 1440 with reduced density and high stiffness exhibits a set of strength properties and reliability characteristics which make it possible to use it for heavy-duty structural elements instead of alloys D16ch and 1163 in both the artificially and naturally aged conditions.
KeywordsGrowth Rate Fatigue Heat Treatment Stress Intensity Intensity Factor
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