کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578608 1514818 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature
چکیده انگلیسی

Three specimens with different initial δ phase contents have been used to study the tensile deformation and fracture characteristics of the delta-processed Inconel 718 alloy at elevated temperatures by tensile tests at 950 °C. The results indicated that the tensile stress–strain curves of the three specimens were the elastic-uniform plastic curves, and there were two deformation processes during the uniform plastic deformation stage of the delta-processed specimens. The strain hardening exponent in the first deformation process was higher than that in the second process, and the value of the strain hardening exponent increased as the content of δ phase increased. In addition, the plasticity of the specimen at elevated temperatures decreased as the content of δ phase increased. However, the fracture mechanisms for all the specimens were all microvoid coalescence ductile fracture, and the δ phase and carbide were the nucleuses for the formation of micropores. The elongation for the specimen with 8.21% pre-precipitated δ phase was still as high as 80%. Thus, delta-processed Inconel 718 alloy presented excellent high-temperature plasticity.


► Delta-processed Inconel 718 alloy presented excellent high-temperature plasticity.
► The tensile fracture mechanisms were all microvoid coalescence ductile fracture.
► The δ phase and carbide were the nucleuses for the formation of micropores.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 528, Issues 19–20, 25 July 2011, Pages 6253–6258
نویسندگان
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