کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582725 1514872 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ageing behavior of a Cu-bearing ultrahigh strength steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Ageing behavior of a Cu-bearing ultrahigh strength steel
چکیده انگلیسی

On ageing at different temperatures a various combination of properties has been obtained for this Cu-bearing ultrahigh strength steel. A substantial increase in strength has been obtained at 450 °C, accompanied by a drop in percentage elongation, percentage reduction in area and toughness. At 550 °C temperature extensive ɛ-Cu precipitates have been observed. The increased strength value retained in the temperature range of 450–600 °C and a secondary hardening peak obtained at 600 °C is probably due to the formation of fine Mo carbide precipitates. The decrease in strength at 650 °C along with an increase in percentage elongation, percentage reduction in area and toughness is due to the coarsening of Cu particles and a partial recovery of matrix. At 700 °C most of the Cu precipitates become rod shaped and formation of fresh martensite with a dark contrast is observed at the lath boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 486, Issues 1–2, 15 July 2008, Pages 152–157
نویسندگان
, , ,