Microstructure and helium irradiation performance of high purity tungsten processed by cold rolling

JOURNAL OF NUCLEAR MATERIALS

卷:479

Article

Chen, Zhe^1,3  Han, Wenjia¹  Yu, Jiangang¹  Kecskes, Laszlo²  Zhu, Kaigui¹  Wei, Qiuming³ 

[1] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China

[2] US Army, Res Lab, WMRD, Aberdeen Proving Ground, MD 21005 USA

[3] Univ N Carolina, Dept Mech Engn, Charlotte, NC 28223 USA

关键词: Rolling;    Tungsten;    Plasma facing materials;    Irradiation;   

DOI  :  10.1016/j.jnucmat.2016.07.038

来源: Elsevier

【 摘 要 】

This work aims to investigate the effects of confined cold rolling on the evolution of microstructure, hardness, and helium irradiation performance of high purity tungsten (W). Using a final rolling temperature of 450 degrees C, W samples were severely deformed by confined cold rolling up to equivalent strains (epsilon(eq)) of 1.6 and 3.3. Experimental results indicate that the average grain size of W specimens processed by confined cold rolling has been greatly reduced, and the rolled W samples with epsilon(eq) similar to 3.3 do not show an ideal texture of (001)[ 110] which is the expected texture of bcc metals processed by conventional cold rolling. The irradiation resistance against 60 keV He+ ions with up to a dose of 1.5 x 10(22) ions.m(-2) of the rolled W is compared to that of the as-received W. Results show that, due to an improvement of the metal's ductility, blister bursting with a partially opened lid forms on the surface of the rolled W, whereas blister bursting with a fully opened lid forms on the surface of the as-received W. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free