面向等离子体W材料改善韧性的方法与机制

doi:10.11900/0412.1961.2018.00404

金属学报

2019, Vol. 55

Issue (2): 171-180 DOI: 10.11900/0412.1961.2018.00404

本期目录 | 过刊浏览

面向等离子体W材料改善韧性的方法与机制

吴玉程^1,^2,³(

)

1 合肥工业大学材料科学与工程学院合肥 230009
2 合肥工业大学有色金属与加工技术国家地方联合工程研究中心合肥 230009
3 太原理工大学新材料界面科学与工程教育部重点实验室太原 030024

The Routes and Mechanism of Plasma Facing Tungsten Materials to Improve Ductility

Yucheng WU^1,^2,³(

)

1 School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
2 National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei University of Technology, Hefei 230009, China
3 Key Laboratory of Interface Science and Engineering of New Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China

引用本文:

吴玉程. 面向等离子体W材料改善韧性的方法与机制[J]. 金属学报, 2019, 55(2): 171-180.
Yucheng WU. The Routes and Mechanism of Plasma Facing Tungsten Materials to Improve Ductility[J]. Acta Metall Sin, 2019, 55(2): 171-180.

全文: PDF(3521 KB) HTML

摘要:

作为面向等离子体候选材料,金属W多晶材料具有低韧性的特点,表现出室温脆性行为和高的韧脆转变温度,极大地限制了其在工程上的应用。针对当前常用的改善W韧性的方法：细化晶粒,添加合金化元素、第二相颗粒和W纤维以及加工变形技术,本文从内韧化和外韧化2种韧化机制来阐述各种韧化方法,以加深对改善W韧性的理解。结合目前国内外研究现状,对改善钨基材料的方法进行讨论并对改善钨基材料发展方向进行简单展望。

关键词 ：面向等离子体材料, W, 韧化机制, 力学性能, 内韧化, 外韧化

Abstract：

As a candidate for plasma facing material (PFM) in nuclear fusion situation, polycrystalline W with a characteristic of bad low temperature ductility shows brittle behaviour at room temperature and possesses a high ductile-to-brittle transition temperature, which limits its engineering application. In this paper, several common methods of grain refinement, addition of alloying elements, second-phase particles and tungsten fibre, and deformation processing for improving ductility of W are illustrated. To in-depth comprehend of how to improving W toughening, these toughening methods are discussed from intrinsic or extrinsic toughening mechanisms. Furthermore, the research status and development prospects for improving ductility of W materials have been presented.

Key words： plasma facing material W toughening mechanism mechanical performance intrinsic toughening extrinsic toughening

收稿日期: 2018-08-31

ZTFLH:

TG146.4

基金资助:资助项目国家重大基础研究磁约束核聚变项目No.2014GB121001B,国家自然科学基金项目Nos.51474083、51574101、51674095和51675154,高等学校学科创新引智计划项目No.B18018

作者简介:

作者简介吴玉程,男,1962年生,教授

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https://www.ams.org.cn/CN/10.11900/0412.1961.2018.00404 或 https://www.ams.org.cn/CN/Y2019/V55/I2/171

图1 内韧化机制和外韧化机制示意图[36]

图2 93W-4.9Ni-2.1Fe-0.03Y合金在不同温度下拉伸后断口形貌的SEM像[63]

图3 W材料热冲击后的SEM形貌[76]

图4 不同裂纹系W单晶在不同温度下的断裂韧性[82]

图5 经过不同轧制比变形后的纯W在不同温度下的Charpy冲击功[86]

图6 W纤维增韧钨基复合材料的韧化机制示意图[102]

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