Yield strength anomaly in B2-ordered feal alloys: Role of boron

被引：23

作者：

Calonne, O

Fraczkiewicz, A

Louchet, F

机构：

[1] Ecole Mines, Ctr SMS, CNRS, URA 1884, F-42023 St Etienne, France

[2] INPG, LTPCM, CNRS, UMR 5614, F-38402 St Martin Dheres, France

来源：

SCRIPTA MATERIALIA | 2000年 / 43卷 / 01期

关键词：

intermetallic alloys; dislocations; segregation; mechanical properties; yield strength anomaly;

D O I：

10.1016/S1359-6462(00)00367-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The yield strength anomaly (YSA) is observed in B-free and B-doped Fe40Al alloys. A small addition of B shifts the YS peak 200 °C and 175 MPa higher than that for the B-free alloy. In the domain of YSA, no sensitivity to the strain rate is observed, suggesting that any modeling of this phenomenon may be built on the basis of an exhaustion/multiplication approach. The outlines of such a model are proposed. The strong effect of boron on YSA is explained by the B-induced slowing down of dislocations, shifting the temperatures to higher values at which the 〈110〉 and 〈100〉 dislocations become mobile.

引用

页码：69 / 75

页数：7

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