通过采用金相显微镜,扫描电镜和能谱分析研究了5A06铝合金高周疲劳断口的微观特征.研究结果表明:该合金在疲劳极限附近发生疲劳断裂时,裂纹主要萌生于杂质粒子与基体的界面结合处,较高应力水平下疲劳裂纹的萌生呈现多源性,并且裂纹主要起源于杂质粒子自身的开裂.随着应力水平的提高,裂纹的偏转路径更加复杂,疲劳辉纹间距不断增大,断口中疲劳裂纹扩展区所占比例减少.疲劳裂纹扩展的初期,疲劳微裂纹的偏转主要取决于相邻晶粒间有利滑移面的方向.
参考文献
| [1] | Wei L L;Pan Q L;Huang H F et al.Influence of grain structure and crystallographic orientation on fatigue crack propagation behavior of 7050 alloy thick plate[J].International Journal of Fatigue,2014,66:55-64. |
| [2] | Chen Y Q;Pan S P;Zhou M Z et al.Effects of inclusions,grain boundaries and grain orientations on the fatigue crack initiation and propagation behavior of 2524-T3 Al alloy[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2013,580:150-158. |
| [3] | Joel Payne;Greg Welsh;Robert J. Christ, Jr.;Jerrell Nardiello;John M. Papazian .Observations of fatigue crack initiation in 7075-T651[J].International Journal of Fatigue,2010(2):247-255. |
| [4] | Newman J C;Anagnostou E L;Rusk D .Fatigue and crack-growth analyses on 7075-T651 aluminum alloy coupons under constant-and variable-amplitude loading[J].International Journal of Fatigue,2014,62:133-143. |
| [5] | Gupta V K;Gangloff R P;Aguew, S R .Diffraction characterization of microstructure scale fatigue crack growth in a modern A1-Zn-Mg-Cu alloy[J].International Journal of Fatigue,2012,42:131-146. |
| [6] | Alexopoulos N D;Migklis Evangelos;Stylianos Antonis et al.Fatigue behavior of the aeronautical Al-Li (2198) aluminum ahoy under constant amplitude loading[J].International Journal of Fatigue,2013,56:95-105. |
| [7] | 刘铭,张坤,戴圣龙,黄敏,伊琳娜.航空用Al-Cu-Mg铝合金疲劳行为研究[J].航空材料学报,2014(01):76-81. |
| [8] | 蹇海根,姜锋,文康,黄宏锋,韦莉莉,蒋龙.不同应力下7B04铝合金的疲劳断口[J].中南大学学报（自然科学版）,2010(01):132-137. |
| [9] | PAO P S;Jones HN;Cheng S F et al.Fatigue crack propagation in ultra-fine grained Al-Mg ahoy[J].International Journal of Fatigue,2005,27(10-12):1164-1169. |
| [10] | PAO P S;Holtz R L;Jones H N .Effect of environment on fatigue crack growth in ultra-fine grain A1-Mg[J].International Journal of Fatigue,2009,31(11-12):1678-1683. |
| [11] | 张占峰,于国林,周德钦.羽毛状晶组织对5A06铝合金疲劳性能的影响[J].轻合金加工技术,2009(12):39-41. |
| [12] | 张红霞,吴广贺,闫志峰,裴飞飞,李晋永,王文先,李永莲.5A06铝合金及其焊接接头的疲劳断裂行为[J].中国有色金属学报,2013(02):327-335. |
| [13] | 张宇玮,潘清林,杜志惠,陈永来,单群.退火温度对Al-Mg合金拉伸性能和显微组织的影响[J].宇航材料工艺,2012(01):61-66. |
| [14] | 佘玲娟,郑子樵,钟申,吴秋萍,李红萍.6156-T62铝合金的高周疲劳性能研究[J].稀有金属材料与工程,2012(07):1201-1205. |
| [15] | 刘新灵;张峥;陶春虎.疲劳断口定量分析[M].北京:国防工业出版社,2010:30-32. |
| [16] | Jian Haigen;Jiang Feng;WEI Li li et al.Crystallographic mechanism for crack propagation in the T7451 Al-Zn-Mg -Cu alloy[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2010,527(21-22):5879-5882. |
| [17] | 郑子樵,陈圆圆,钟利萍,佘玲娟,翟同广.2524-T34合金疲劳裂纹的萌生和扩展行为[J].中国有色金属学报,2010(01):37-42. |
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