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Comparison of early stages of precipitation in Mo-rich and Mo-poor maraging stainless steels

Marcus Andersson (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; Krystyna Stiller (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; M. Hattestrand
Surface and Interface Analysis (0142-2421). Vol. 39 (2007), 2-3, p. 195-200.
[Artikel, refereegranskad vetenskaplig]

The precipitation process during ageing in the Mo-poor alloy Carpenter 455 has been investigated by three-dimensional atom probe (3DAP) and energy-filtered transmission electron microscopy. The ageing treatment was performed at 475 degrees C for 5 min, 25 min, 1 h and 2 h. The precipitation of a mixed Ni-, Ti- and Cu-rich phase was observed after 25 min of ageing. A complete separation between Ni/Ti-rich and Cu-rich regions occurred within 1-2 h of ageing. After 2 h of ageing at 475 degrees C, coarsening of the eta-Ni3Ti precipitates was observed. Moreover, large Ni/Ti-rich and Cu-rich particles were observed in the lath boundaries after 2 h of ageing. The results were compared with the precipitation process in the Mo-rich alloy 1RK91. Copyright (C) 2007 John Wiley & Sons, Ltd.

Nyckelord: atom probe, maraging steels, precipitation, ageing



Denna post skapades 2008-11-07. Senast ändrad 2016-10-14.
CPL Pubid: 77304

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Mikroskopi och mikroanalys (2005-2012)

Ämnesområden

Teknisk fysik

Chalmers infrastruktur