铝合金搅拌摩擦裂纹修复区的显微组织及力学性能
对表面预制了0.8mm深、0.5mm宽裂纹的2Al2铝合金进行搅拌摩擦修复,修复后对其修复区显微组织变化规律和力学性能进行了详细研究.结果表明：在合理修复工艺下,实现了裂纹的修复,修复区的平均抗拉强度Km、屈服强度可达到母材的90.1%和92.2%.修复区存在3个组织变化区,其中修复核心区的晶粒被反复碎化、长大及动态再结晶;热机影响区晶粒具有明显的塑性变形,与晶粒显著长大的热影响区共同构成组织软化区;表面硬度与截面上部硬度曲线相似,截面硬度上部依次高于下部;修复核心区存在大量的小角晶粒,并且内部存在一定密度的位错,在晶粒四周均匀分布细小强化相....
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| Published in | 东北大学学报（自然科学版） Vol. 39; no. 1; pp. 112 - 117 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
东北大学 航空动力装备振动及控制教育部重点实验室,辽宁 沈阳 110819%沈阳航空航天大学 机电工程学院,辽宁 沈阳,110136%沈阳飞机工业(集团)有限公司 45厂,辽宁 沈阳,110850
2018
东北大学 机械工程与自动化学院,辽宁 沈阳 110819 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-3026 |
| DOI | 10.12068/j.issn.1005-3026.2018.01.023 |
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| Abstract | 对表面预制了0.8mm深、0.5mm宽裂纹的2Al2铝合金进行搅拌摩擦修复,修复后对其修复区显微组织变化规律和力学性能进行了详细研究.结果表明：在合理修复工艺下,实现了裂纹的修复,修复区的平均抗拉强度Km、屈服强度可达到母材的90.1%和92.2%.修复区存在3个组织变化区,其中修复核心区的晶粒被反复碎化、长大及动态再结晶;热机影响区晶粒具有明显的塑性变形,与晶粒显著长大的热影响区共同构成组织软化区;表面硬度与截面上部硬度曲线相似,截面硬度上部依次高于下部;修复核心区存在大量的小角晶粒,并且内部存在一定密度的位错,在晶粒四周均匀分布细小强化相. |
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| AbstractList | TG113.26+3; 对表面预制了0.8 mm深、0.5 mm宽裂纹的2A12铝合金进行搅拌摩擦修复,修复后对其修复区显微组织变化规律和力学性能进行了详细研究.结果表明:在合理修复工艺下,实现了裂纹的修复,修复区的平均抗拉强度Rm、屈服强度ReL可达到母材的90.1％ 和92.2％.修复区存在3个组织变化区,其中修复核心区的晶粒被反复碎化、长大及动态再结晶;热机影响区晶粒具有明显的塑性变形,与晶粒显著长大的热影响区共同构成组织软化区;表面硬度与截面上部硬度曲线相似,截面硬度上部依次高于下部;修复核心区存在大量的小角晶粒,并且内部存在一定密度的位错,在晶粒四周均匀分布细小强化相. 对表面预制了0.8mm深、0.5mm宽裂纹的2Al2铝合金进行搅拌摩擦修复,修复后对其修复区显微组织变化规律和力学性能进行了详细研究.结果表明：在合理修复工艺下,实现了裂纹的修复,修复区的平均抗拉强度Km、屈服强度可达到母材的90.1%和92.2%.修复区存在3个组织变化区,其中修复核心区的晶粒被反复碎化、长大及动态再结晶;热机影响区晶粒具有明显的塑性变形,与晶粒显著长大的热影响区共同构成组织软化区;表面硬度与截面上部硬度曲线相似,截面硬度上部依次高于下部;修复核心区存在大量的小角晶粒,并且内部存在一定密度的位错,在晶粒四周均匀分布细小强化相. |
| Abstract_FL | Aviation aluminum alloy 2 A12 containing the prefabricated 0. 8 mm deep and 0. 5 mm horizontal cracks was repaired by the friction stir method, and the microstructure evolution and mechanical properties of the healing zone were observed and analyzed in details. The results showed that the crack repairing is realized in the reasonable healing process, and the tensile strength Rm and the yield strength ReL can reach 90. 1％ and 92. 2％ of the base metal. The healing zone consists of three different evolution zones, and in the core zone the cracks are repaired by grain fragmentation, growth and recrystallization. The structural softened zone consists of the thermo-mechanically affected zone with obvious plastic deformation and the heat affected zone with obvious grain growth. The surface hardness is similar to that of the upper cross section with the upper section being harder than that of the lower section. The healing core zone consists of many small angle crystals with dislocated lines inside and tiny strengthening phases around. |
| Author | 任俊刚;谢里阳;王磊;张占昌 |
| AuthorAffiliation | 东北大学机械工程与自动化学院,辽宁沈阳110819;东北大学航空动力装备振动及控制教育部重点实验室,辽宁沈阳110819;沈阳航空航天大学机电工程学院,辽宁沈阳110136;沈阳飞机工业（集团）有限公司45厂,辽宁沈阳110850 |
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| Author_FL | XIE Li-yang REN Jun-gang ZHANG Zhan-chang WANG Lei |
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| ClassificationCodes | TG113.26+3 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DocumentTitleAlternate | Microstructure and Mechanical Properties of Crack Repairing Zone of Aluminum Alloy Through Friction Stir |
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| Keywords | 力学性能 搅拌摩擦 2A12铝合金 friction stir aluminum alloy 2 A12 microstructure 微观组织 裂纹修复 crack repairing mechanical property |
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| Notes | 21-1344/T REN Jun-gang1,2 , XIE Li-yang1,2 , WANG Lei3 , ZHANG Zhan-chang4（1. School of Mechanical Engineering ＆Automation,Northeastern University,Shenyang 110819,China; 2. Key Laboratory of Vibration and Control of Aero-Propulsion System,Ministry of Education,Northeastern University, Shenyang 110819, China; 3. Department of Electromechanical Engineering, Shenyang Aerospace University, Shenyang 110136, China; 4. Workshop 45 , Shenyang Aircraft Corporation, Shenyang 110850, China.） |
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| PublicationYear | 2018 |
| Publisher | 东北大学 航空动力装备振动及控制教育部重点实验室,辽宁 沈阳 110819%沈阳航空航天大学 机电工程学院,辽宁 沈阳,110136%沈阳飞机工业(集团)有限公司 45厂,辽宁 沈阳,110850 东北大学 机械工程与自动化学院,辽宁 沈阳 110819 |
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| Snippet | ... TG113.26+3; 对表面预制了0.8 mm深、0.5 mm宽裂纹的2A12铝合金进行搅拌摩擦修复,修复后对其修复区显微组织变化规律和力学性能进行了详细研究.结果表明:在合理修复工艺下,实现了裂纹的修复,修复区的平均抗拉强度Rm、屈服强度ReL可达到母材的90.1％... |
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| SubjectTerms | 2Al2铝合金 力学性能 微观组织 搅拌摩擦 裂纹修复 |
| Title | 铝合金搅拌摩擦裂纹修复区的显微组织及力学性能 |
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