کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5456467 1514662 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of copper in microstructures and mechanical properties of laser-welded Fe-19Ni-3Mo-1.5Ti maraging steel joint
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
The role of copper in microstructures and mechanical properties of laser-welded Fe-19Ni-3Mo-1.5Ti maraging steel joint
چکیده انگلیسی
The laser-welded Fe-19Ni-3Mo-1.5Ti maraging steel joints with high strength and toughness were successfully obtained using the approach of the combination of Cu and aging temperature. This study underscores that the element of Cu has a significant effect on precipitates and reverted austenite, by influencing the element diffusion and phase transformation. For the strength, the element of Cu in the weld metal brings a lot of ε-Cu precipitates during the aging period. The amount of ε-Cu precipitates increases gradually with the increase of the aging temperature, which is beneficial to the strength. For the toughness, the addition of Cu changes the diffusion kinetic condition to promote the diffusion of Ni, resulting in the decrease of segregation of elements. The reverted austenite in grain boundaries which has an adverse effect on the toughness is correspondingly reduced. Meanwhile, Cu makes the thermodynamic condition different, with a lower critical driving force of phase transformation. This causes the increase of reverted austenite in the matrix, which is advantageous to the toughness. An excellent combination of strength and toughness of laser-welded maraging steel joint can be optimized by the appropriate content of Cu and aging temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 681, 10 January 2017, Pages 41-49
نویسندگان
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