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| Invar36合金搅拌摩擦焊焊缝的低温韧性 | |
| 引用本文： | 赵玥,吴爱萍,YUTAKA S. Sato,HIROYUKI Kokawa. Invar36合金搅拌摩擦焊焊缝的低温韧性[J]. 焊接学报, 2011, 32(12): 89-92 |
| 作者姓名： | 赵玥 吴爱萍 YUTAKA S. Sato HIROYUKI Kokawa |
| 作者单位： | 1. 清华大学先进成形制造教育部重点实验室,北京,100084 2. DepartmentofMaterialsProcessing,GraduateSchoolofEngineering,TohokuUniversity6-6-02Aramaki—aza—Aoba,Sendai980—8579,Japan |
| 摘 要： | 为了研究Invar36合金搅拌摩擦焊焊缝的低温韧性，采用小冲杆试验方法（small punch test）对焊接速度2mm／s，搅拌头旋转频率200一1000r／min的Invar36合金焊缝进行低温（77K）和室温（298K）韧性测试．298K下，所有焊接工艺的焊缝小冲杆试验能均高于母材，焊缝韧性随搅拌头旋转频率的提... |
| 关 键 词： | Invar36合金 搅拌摩擦焊 低温韧性 小冲杆试验 |
| 收稿时间： | 2011-06-30 |
Fracture toughness of friction stir welded Invar 36 alloy at low temperature |
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| ZHAO Yue,WU Aiping,YUTAKA S. Sato and HIROYUKI Kokawa. Fracture toughness of friction stir welded Invar 36 alloy at low temperature[J]. Transactions of The China Welding Institution, 2011, 32(12): 89-92 | |
| Authors: | ZHAO Yue WU Aiping YUTAKA S. Sato HIROYUKI Kokawa |
| Affiliation: | Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China,Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China,Department of Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aramakiaza-Aoba, Sendai 980-8579, Japan and Department of Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aramakiaza-Aoba, Sendai 980-8579, Japan |
| Abstract: | The fracture toughness of friction stir welded Invar36 alloy, obtained with travelling speed of 2 mm/s and rotational speed from 200 r/min to 1000 r/min, were estimated at low temperature(77 K) by small punch test, and were compared with that at room temperature(298 K) as well. At 298 K, all welds have higher small punch energy than the base material. For the welds acquired with the same welding parameters, the small punch energy tested at 77 K is always higher than the ones at 298 K. The small punch energy of welds trends to increase with decreasing of the rotational speed at both 77 K and 298 K. With rotational speeds equal or less than 400 r/min, the small punch energy of welds is significantly higher than that of the base material at 77 K. The results indicate that the friction stir welds keep excellent ductility at low temperature. With the increase of travelling speed, higher heat input produces a coarser microstructure and leads to the reduction of fracture toughness in the weld. |
| Keywords: | Invar 36 alloy friction stir welding fracture toughness small punch test |
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