| Numéro |
J. Phys. Colloques
Volume 49, Numéro C5, Octobre 1988
Interface Science and Engineering '87An International Conference on the Structure and Properties of Internal Interfaces |
|
|---|---|---|
| Page(s) | C5-699 - C5-704 | |
| DOI | https://doi.org/10.1051/jphyscol:1988592 | |
Interface Science and Engineering '87
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-699-C5-704
DOI: 10.1051/jphyscol:1988592
R&D Laboratories-I, Nippon Steel Corporation, 1618 Ida, Nakaharaku, Kawasaki 211, Japan
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-699-C5-704
DOI: 10.1051/jphyscol:1988592
THE EFFECT OF MANGANESE ON INTERGRANULAR FRACTURE IN LOW ALLOY STEELS
K. TATSUMI, N. OKUMURA et M. YAMAMOTOR&D Laboratories-I, Nippon Steel Corporation, 1618 Ida, Nakaharaku, Kawasaki 211, Japan
Abstract
The grain boundary embrittlement of low alloy steels was studied, attention being paid to the effect of manganese concentration. The prior austenite grain boundary of tempered martensitic samples containing 0.5, 1.0, 1.5 wt% Mn were analyzed by AES. (1)Increasing bulk manganese content was found to cause a small increase in the amount of segregated phosphorus and a decrease in the amount of segregated carbon. (2)Measurements of internal friction (Snoek peak) showed that the addition of manganese lowered the concentration of dissolved carbon. Based on these facts, the embrittling effect of manganese can be explained by the decrease of the concentration of segregated carbon which strengthens grain boundaries.