The correlation between yielding behavior and precipitation in ultra purified ferritic stainless steels

被引：31
作者：
Liu, Z. Y. [1 ]
Gao, F. [1 ]
Jiang, L. Z. [2 ]
Wang, G. D. [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling Technol & Automat, Shenyang 110004, Liaoning Prov, Peoples R China
[2] Baosteel Co, R&D Ctr, Res Inst Stainless Steels, Shanghai 201900, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 16-17期
关键词：
Ultra purified ferritic stainless steel; Annealing; Luders elongation; Laves phase; CARBON; TEXTURE; RECRYSTALLIZATION; STRENGTH; NB;
D O I：
10.1016/j.msea.2010.03.047
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cold rolled sheets of a ultra purified ferritic stainless steel were annealed either by being slowly cooled from 950 degrees C or being rapidly cooled to room temperature from the intermediate holding at 750 degrees C. The former exhibited substantial Luders elongation during tensile testing, while the later showed continuous yielding behavior. In the slowly cooled sheet, both Nb(C, N) and (Fe, Cr)(2)Nb have been formed, and no (Fe. Cr)(2)Nb could be observed in the rapidly cooled sheet. The fast growth of (Fe, Cr)(2)Nb is believed to have caused local depletion of Nb atoms around fine NbC particles, resulting in their dissolution and having carbon atoms released for the formation of the Cottrell atmosphere. These results have been confirmed by the internal friction measurements and thermodynamic calculations. (C) 2010 Elsevier B.V. All rights reserved.
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页码：3800 / 3806
页数：7
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