کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
829230 1470337 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved mechanical properties of Ti–6Al–4V alloy by electron beam welding process plus annealing treatments and its microstructural evolution
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Improved mechanical properties of Ti–6Al–4V alloy by electron beam welding process plus annealing treatments and its microstructural evolution
چکیده انگلیسی


• The improvement in mechanical properties of Ti–6Al–4V EBW weldment is achieved.
• The α2 + γ phases formed in the FZ are firstly reported in Ti–6Al–4V EBW weldment.
• Composition up to 41–48 at.% Al after EBW is confirmed leading to α2 + γ formation.
• The formed α2 + γ phases in the FZ possess same properties as Ti–Al based alloys.
• The understanding of microstructure in the FZ of weldment is improved using HRTEM.

In this study, we investigated the effect of post weld annealing treatments on the mechanical properties of a Ti–6Al–4V alloy following electron beam welding (EBW). The operational parameters used in this EBW process together with suitable annealing treatments appeared to substantially enhance the tensile properties of the Ti–6Al–4V weldment, suggesting that EBW is a promising method for industrial application. Moreover, we report for the first time that γ-TiAl + α2-Ti3Al formed in the fusion zone of the Ti–6Al–4V EBW weldment and exhibited the same lamellar structure, orientation relationship, deformation mechanism, and slip system as common Ti–Al-based alloys do. The presence of these intermetallic compounds affected the mechanical properties of the weldment. We discuss the related phase transformation, microstructural evolution, and characteristics of the precipitates formed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 60, August 2014, Pages 587–598
نویسندگان
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