3-2 Microstructure and Mechanical Properties of Tungsten at Elevated Temperatures

• 作者: Dai Yong Shen Tielong Vladimir Krsjak Wang Zhiguang YongJoong Lee
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报：英文版
• 学科: 物理学
• 关键词: TUNGSTEN ELEVATED TEMPERATURES
• 年，卷（期）: 2014,（1）
• 页码范围: 88-89
• 页数: 2页
• 分类号: O4

摘要

Because of its advantages of high neutron yield, high melting point, high thermal conductivity and low sputteringyield, tungsten is proposed as solid target material in many spallation neutron source facilities and even acceleratordriven sub-critical system (ADS) device in future. Microstructural and mechanical properties of powder-metallurgypure tungsten material, which is prepared with two different production methods of hot rolling and forging process,have been investigated in this study. Because of anisotropic structure induced by different thermal treatments,specimens in different orientations were cut from the hot forged and rolled materials. Metallography observationwas performed in order to identify the grain structure of the forged and rolled tungsten materials. Consideringsurface effect on mechanical properties of tungsten, the tensile test of all hot rolled samples with two differentsurface conditions of as-machined and electro-polished were also performed in the temperature range of 25 500 ?C.