Effects of phosphorus grain boundary segregation and hardness on the ductile-to-brittle transition for a 2.25CrlMo steel

被引：6
|
作者：
Song Shenhua [1 ]
Yuan Zexi
Shen Dongdong
Weng Luqian
机构：
[1] Harbin Inst Technol, Shenzhen Grad Sch, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
[2] Wuhan Univ Sci & Technol, Sch Mat & Met, Wuhan 430081, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2007年 / 22卷 / 01期
基金：
中国国家自然科学基金;
关键词：
segregation; grain boundary; high strength low alloy steel; embrittlement; fracture; LOW-ALLOY STEELS; CLEAVAGE FRACTURE-STRESS; NI-CR STEEL; TEMPER EMBRITTLEMENT; PREDICTION; MOLYBDENUM; IRON;
D O I：
10.1007/s11595-005-1001-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The combined effect of phosphorus grain boundary segregation and hardness on the ductile-to-brittle transition was examined for a P-doped 2.25Cr1Mo steel by using Auger electron spectroscopy in conj. unction with hardness measurements, Charpy impact tests and scanning electron microscopy. With prolonging time at 540 degrees C after water quenching from 980 degrees C, the segregation of phosphorus increases and the hardness decreases. The DBTT (FATT) increases with increasing phosphorus segregation and decreases with decreasing hardness. The effect of phosphorus segregation is dominant until 100 h aging and after that the hardness effect becomes dominant. This effect makes the DBTT (FATT) decrease with further prolonging ageing time although the segregation of phosphorus still increases strongly.
引用
收藏
页码：1 / 6
页数：6
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