TY - JOUR

T1 - Modelling Chi-phase precipitation in high molybdenum stainless steels

AU - Xu, W.

AU - San Martin, D.

AU - Rivera Diaz Del Castillo, P. E J

AU - Van Der Zwaag, S.

PY - 2007

Y1 - 2007

N2 - High molybdenum high strength stainless steels can contain the so-called Chi phase (Fe36Cr12Mo10). The presence of this phase, which normally occurs at grain boundaries, depletes the chromium content leading to intergranular corrosion. This may cause alloy embrittlement during long term use. The presence of such phase has proven to be highly sensitive to alloy processing parameters such as the cooling rate after a final heat treatment. The present work provides a model to quantify the effects of processing parameters aimed at controlling the Chi phase. The model is based on nucleation and growth classical theories involving capillarity effects for the early stages; it is applied to a range of heat treatment conditions and compared to experimental results.

AB - High molybdenum high strength stainless steels can contain the so-called Chi phase (Fe36Cr12Mo10). The presence of this phase, which normally occurs at grain boundaries, depletes the chromium content leading to intergranular corrosion. This may cause alloy embrittlement during long term use. The presence of such phase has proven to be highly sensitive to alloy processing parameters such as the cooling rate after a final heat treatment. The present work provides a model to quantify the effects of processing parameters aimed at controlling the Chi phase. The model is based on nucleation and growth classical theories involving capillarity effects for the early stages; it is applied to a range of heat treatment conditions and compared to experimental results.

KW - Chi-phase

KW - Modelling

KW - Precipitation

KW - Stainless steel

M3 - Journal article

AN - SCOPUS:57649090005

VL - 15-17

SP - 531

EP - 536

JO - Advanced Materials Research

JF - Advanced Materials Research

SN - 1022-6680

ER -