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

被引：0
作者：
Golpayegani, Ardeshir [1 ]
Andren, Hans-Olof [1 ]
机构：
[1] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden
来源：
Solid-Solid Phase Transformations in Inorganic Materials 2005, Vol 1 | 2005年
关键词：
9-12% chromium steel; precipitates; M23C6; carbides; coarsening rate; APFIM; EFTEM; Mo-B clustering;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
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 M23C6 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 front 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 MoB clustering.
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页码：461 / 466
页数：6
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