Effect of Low Temperature Aging on Hall-Petch Coefficient in Ferritic Steels Containing a Small Amount of Carbon and Nitrogen

被引：17

作者：

Araki, Satoshi ^{[1
]}

Fujii, Kohei ^{[2
,3
]}

Akama, Daichi ^{[4
,5
]}

Tsuchiyama, Toshihiro ^{[4
,5
]}

Takaki, Setsuo ^{[4
,5
]}

Ohmura, Takahito ^{[6
]}

Takahashi, Jun ^{[7
]}

机构：

[1] Kyushu Univ, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Fukuoka, Japan

[3] Hitachi Met, Tokyo, Japan

[4] Kyushu Univ, Grad Sch Engn, Dept Mat Sci & Engn, Fukuoka, Japan

[5] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Fukuoka, Japan

[6] Natl Inst Mat Sci, Tsukuba, Ibaraki, Japan

[7] Nippon Steel Sumitomo Met Corp, Adv Technol Res Labs, Tokyo, Japan

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 2017年 / 103卷 / 08期

关键词：

grain boundary segregation; age hardening; grain refinement strengthening; ferritic steel; Hall-Petch relationship; GRAIN-BOUNDARY SEGREGATION; INTERSTITIAL ELEMENTS; YIELD-STRESS; IRON; PRECIPITATION; ALLOYS; MN;

D O I：

10.2355/tetsutohagane.TETSU-2017-008

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Effect of aging treatment at 373 K on Hall-Petch coefficient (k(y)) was investigated in consideration of the change in friction stress associated with carbide/nitride precipitation in ferritic steels containing 60 ppm carbon or nitrogen (C60 and N60). Tensile tests revealed that the ky was monotonously increased with increasing aging time in both steels, and also, C60 exhibited a larger Icy value than that of N60 under the same aging time. As a result of 3DAP analysis and theoretical calculation for grain boundary segregation of carbon and nitrogen, the Icy corresponded to the amount of carbon and nitrogen existing at grain boundary. There was no difference in the effect on ky increment between both elements. The larger ky in C60 under the same aging condition was due to the larger amount of segregated carbon compared with nitrogen.

引用

页码：491 / 497

页数：7

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