Ghosh, Arindam and Das, Samar and Chatterjee, S (2008) Ageing behavior of a Cu-bearing ultrahigh strength steel. Materials Science and Engineering A, 486 (1-2). pp. 152-157.
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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 -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.
|Uncontrolled Keywords:||Ageing; Ultrahigh strength steel; Copper precipitates; Lath martensite; Mechanical properties|
|Divisions:||Material Science and Technology|
|Deposited By:||INVALID USER|
|Deposited On:||19 Oct 2009 15:39|
|Last Modified:||14 Dec 2011 17:07|
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