Boron effects on the ductility of a nano-cluster-strengthened ferritic steel
Artikel i vetenskaplig tidskrift, 2011

The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 degrees C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil. (C) 2010 Elsevier B.V. All rights reserved.

Författare

Z. W. Zhang

C. T. Liu

J. L. Cheng

G. Chen

T. Fujita

M. W. Chen

Y. W. Chung

S. Vaynman

M. E. Fine

B. A. Chin

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

0921-5093 (ISSN)

Vol. 528 855-859

Ämneskategorier

Metallurgi och metalliska material

DOI

10.1016/j.msea.2010.10.058