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Mechanism for beneficial effect of boron addition on creep resistance of 9-12% chromium steels

Ardeshir Golpayegani (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; Hans-Olof Andrén (Institutionen för teknisk fysik, Mikroskopi och mikroanalys)
International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005; Phoenix, AZ; United States; 29 May 2005 through 3 June 2005 Vol. 1 (2006), p. 461-466.
[Konferensbidrag, refereegranskat]

Energy filtered transmission electron microscopy has been used to study two similar steels after long time aging, with different boron additions, to measure the effect of B on coarsening rate of M23Ce precipitates. The mechanism behind the effect of boron could either be a drastic decrease in the energy of the interface between M23C6 and matrix or a decrease in flux of atoms from a shrinking precipitate to a growing one. We suggest that the latter mechanism is operating, based on atom probe (APFIM) measurements of boron solubility in the matrix and the detection of Mo-B clustering.



Denna post skapades 2006-01-19. Senast ändrad 2016-06-17.
CPL Pubid: 10661

 

Institutioner (Chalmers)

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

Ämnesområden

Konstruktionsmaterial

Chalmers infrastruktur