کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
776716 1463759 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of duplex aging on microstructure and mechanical behavior of beta titanium alloy Ti–15V–3Cr–3Al–3Sn under unidirectional and cyclic loading conditions
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Effect of duplex aging on microstructure and mechanical behavior of beta titanium alloy Ti–15V–3Cr–3Al–3Sn under unidirectional and cyclic loading conditions
چکیده انگلیسی


• Duplex aging (DA) in place of single aging (SA) of beta titanium alloy 15-3 led to higher strength.
• Higher strength after DA was related to finer and denser precipitation of α particles.
• DA resulted in major improvement in HCF life over SA.
• Freedom from micro-PFZs and grain boundary α led to better HCF life after DA.
• Improved HCF life after DA was achieved even at a high mean stress level (stress ratio = +0.3).

The microstructure and mechanical behavior of beta titanium alloy Ti–15V–3Cr–3Al–3Sn (Ti15-3) under unidirectional and high cycle fatigue (HCF) loading conditions were studied after single aging (SA) and duplex aging (DA). After SA, well-developed grain boundary α and micro precipitate free zones (micro PFZs) were present in the microstructure. Whereas after DA, grain boundary α was poorly developed and micro PFZs were absent. DA resulted in smaller size, higher density and volume fraction of alpha particles. DA led to higher work hardening rate, better strength-ductility combination and higher HCF life. Improved mechanical behavior after DA is explained based on microstructural observations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 73, April 2015, Pages 88–97
نویسندگان
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