Relation of ductile-to-brittle transition temperature to phosphorus grain boundary segregation for a Ti-stabilized interstitial free steel

被引：37

作者：

Chen, X. -M. ^{[1
]}

Song, S. -H. ^{[1
]}

Weng, L. -Q. ^{[1
]}

Liu, S. -J. ^{[1
]}

Wang, K. ^{[2
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China

[2] Cent Iron & Steel Res Inst, Dept Superalloys, Beijing 100081, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 28期

基金：

中国国家自然科学基金;

关键词：

Interstitial free steel; Grain boundary; Segregation; DBTT; HIGH-STRENGTH STEELS; LOW-ALLOY STEEL; TEXTURE FORMATION; HOT DUCTILITY; CARBON-STEELS; EMBRITTLEMENT; PRECIPITATION; BEHAVIOR; DEPENDENCE; SHEET;

D O I：

10.1016/j.msea.2011.08.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Equilibrium grain boundary segregation of phosphorus in a Ti-stabilized interstitial free (IF) steel is measured using Auger electron spectroscopy (AES) after the specimens are aged for adequate time at different temperatures between 600 and 850 degrees C. Based on the experimental data of equilibrium grain boundary segregation along with the McLean equilibrium segregation theory, the free energy of segregation of phosphorus is evaluated to be similar to 44.8 kJ/mol, being independent of temperature. With the AES results being combined with the ductile-to-brittle transition temperatures (DBTTs) determined by impact tests, a relationship between DBTT and phosphorus boundary concentration is established. Predictions with the relationship indicate that cold work embrittlement may be severe if the steel is annealed at relatively low temperatures after cold rolling. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：8299 / 8304

页数：6

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