| LD10铝合金方形臂裂纹分析 |
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| 引用本文： | 卢增威,彭凯,程琴,陈昕.LD10铝合金方形臂裂纹分析[J].失效分析与预防,2013(3):161-166. |
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| 作者姓名： | 卢增威 彭凯 程琴 陈昕 |
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| 作者单位： | [1]沈阳飞机工业集团（有限）公司,沈阳110850 [2]大连船用柴油机有限公司,辽宁大连116021 [3]中航工业北京航空材料研究院,北京100095 [4]江西昌河航空工业有限公司,江西景德镇333002 |
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| 摘 要： | 锻铝合金扭力臂进行疲劳试验时,扭力方形臂叉耳端发生开裂。对方形臂叉耳端裂纹断口的宏微观形貌进行了观察和能谱成分分析,对方形臂的金相组织和低倍组织进行了检查,测试了方形臂的硬度,确定了方形臂的开裂性质及原因。研究结果表明,扭力方形臂裂纹的性质为微动疲劳开裂。方形臂与衬套之间磨粒磨损引起的微动磨损是导致方形臂开裂的直接原因,方形臂流线分布不合理也在一定程度上降低了零件的力学性能。
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| 关 键 词： | 扭力方形臂 LD10铝合金 微动疲劳 流线分布 疲劳裂纹 |
Analysis on Crack of LD10 Aluminum Alloy Square Arm |
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| LU Zeng-wei,PENG Kai,CHENG Qin,CHEN Xin.Analysis on Crack of LD10 Aluminum Alloy Square Arm[J].Failure Analysis and Prevention,2013(3):161-166. |
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| Authors: | LU Zeng-wei PENG Kai CHENG Qin CHEN Xin |
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| Affiliation: | 1. AVIC Shenyang Aircraft Corporation, Shenyang 110850, China; 2. Dalian Marine Diesel Co., Ltd., Liaoning Dalian 116021, China; 3. AVIC Beijing Institute of Aeronautical Materials, Belting 100095, China; 4. Changhe Aircraft Industries Group Co., Ltd., Jiangxi Jingdezhen 333002, China) |
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| Abstract: | The lower cross section of torque force square arm cracked after fatique endurance testing, it was made of forging aluminum. The cause of the failure were analyzed by macro and micro observation of the cracks and fracture surfaces, examination of the cracks metallography. The result indicates that the toque force square arm area crack was inching fatigue cracks. The immediate reason of toque force square arm dehiscence is the inching wear between square arm and gasket. streamline distributing irrationally for fatigue expansion promoter action. |
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| Keywords: | torque force square arm LD10 Al-alloy fretting fatigue streamline distributing fatigue crack |
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