کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1572433 1514427 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of artificial aging on the microstructure of weldment on API 5L X-52 steel pipe
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of artificial aging on the microstructure of weldment on API 5L X-52 steel pipe
چکیده انگلیسی

The effects of artificial aging on the microstructure in the weldment of an API 5L X-52 steel pipe were studied. Aging was performed at 250 °C over a period of 1000 h and values were recorded at every 100 h intervals. Transmission electron microscopy observations showed precipitation strengthening from nearly circular Nb–C containing nanoparticles for the base metal and heat affected zone, and cementite for the weld metal. The largest amount of precipitation in the weldment zone was obtained at 500 h, due to peak-aging, which showed the highest particle density. The weld metal was more susceptible to aging, exhibiting the highest increase in precipitation at 500 h, followed by the heat affected zone. After 500 h, the deterioration in the microstructure was caused by the coarsening of particles due to over-aging. The base metal showed the larger increment in particle size after 900 h of aging accompanied by a bigger decrease in fine particles than in the weld metal.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 58, Issues 8–9, August–September 2007, Pages 721–729
نویسندگان
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