Effect of cooling rate on mechanical properties of aged ITER-grade CuCrZr

被引：32

作者：

Park, Jeong-Yong ^{[1
]}

Lee, Jung-Suk ^{[1
]}

Choi, Byung-Kwon ^{[1
]}

Hong, BongGuen ^{[2
]}

Jeong, Yong Hwan ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Adv Core Mat Lab, Taejon 305353, South Korea

[2] Korea Atom Energy Res Inst, Ctr Fus Engn, Taejon 305353, South Korea

来源：

FUSION ENGINEERING AND DESIGN | 2008年 / 83卷 / 10-12期

关键词：

CuCrZr; Aging; Cooling rate; ITER;

D O I：

10.1016/j.fusengdes.2008.07.006

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The effects of the cooling rate on the microstructure and the mechanical properties of aged CuCrZr alloys were examined. The CuCrZr alloys were solution annealed at 980 degrees C for 0.5 h, cooled down by four different cooling methods and then aged at 400-620 degrees C for 2 h. The strength showed the highest value at an aging temperature of 440 degrees C irrespective of the cooling rate and it was decreased gradually with an increase of the aging temperature up to 620 degrees C. The strength of the CuCrZr alloys was highly dependant on the distribution of the precipitates and the highest strength was obtained in the CuCrZr alloys with a number of Guinier-Preston zones. For the same aging temperature, the strength was increased with the cooling rate but the difference in the strength became smaller when the CuCrZr alloys were aged at above 580 degrees C. The yield strength of the CuCrZr alloys was higher than the minimum value (150 MPa at 250 degrees C) required for the design of the International Thermonuclear Experimental Reactor first wall up to an aging temperature of 600 degrees C when a gas cooling method after a solution annealing was performed with cooling rates of 89 and 207 degrees C/min. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1503 / 1507

页数：5

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