کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1572838 1000704 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of cooling rate on structure and properties of an ultra-low carbon HSLA-100 grade steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of cooling rate on structure and properties of an ultra-low carbon HSLA-100 grade steel
چکیده انگلیسی

An ultra-low carbon HSLA-100 grade steel was subjected to two stage forging operation followed by different post-cooling techniques. Higher strength value obtained at a faster cooling rate of 35 °C/s is due to highly dislocated acicular ferrite structure along with fine precipitation of microalloying carbides and/or carbonitrides. At a slower cooling rate of 1.15 °C/s the strength value drops with an increase in ductility due to larger volume fraction of less dislocated polygonal ferrite structure. The strength value remained almost unchanged with a further decrease in cooling rate to 0.68 °C/s due to the formation of predominantly polygonal ferrite microstructure. At slower post-cooling rates high impact toughness value obtained at ambient and at − 40 °C testing temperature is due to fine grained polygonal ferrite microstructure. At all post-cooling conditions the change in impact toughness value at ambient and at − 40 °C temperature was found to be negligible due to the ultra-low carbon content of the steel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 56, Issue 1, January 2006, Pages 59–65
نویسندگان
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