完成了6根表面经滚压处理的漏斗形圆棒试样疲劳短裂纹复型实验,结果表明其短裂纹行为表现出明显的微观结构短裂纹(MSC)和物理短裂纹(PSC)2阶段特征.在MSC阶段,由于不同微观结构障碍的阻碍,主导短裂纹出现2次较明显的扩展减速,进入PSC阶段后,随着主导短裂纹尺度的增长,该现象不再显著.与表面未经滚压的试样相比,在给定主导短裂纹尺度条件下,滚压试样的裂纹扩展速率低得多,这种差异在MSC阶段可达1个数量级.滚压试样平均疲劳寿命达到未滚压试样的6.4倍.表面滚压处理有效抑制了微裂纹的形核与合并,改善了局部微观结构条件,并推迟了MSC与PSC过渡阶段的到来,提高了材料的抗疲劳性能.对主导短裂纹尺度、疲劳寿命分数和有效短裂纹密度3种特征参量进行分析,确定了其良好假设分布和统计演化规律.
参考文献
| [1] | Liu E Z,Zheng Z,Tong J,Ning L K,Guan X R.Acta Metall Sin,2010; 46:708(刘恩泽,郑志,佟健,宁礼奎,管秀荣.金属学报,2010; 46:708) |
| [2] | Hu Y H,Zhang Z,Zhong Q P,Han B C.J Mech Strength,2009; 31:979(胡燕慧,张峥,钟群鹏,韩邦成.机械强度,2009; 31:979) |
| [3] | Suresh S,translated by Wang Z G.Fatigue of Materials.2nd Ed,Beijing:National Defense Industry Press,1999:387(Suresh S著,王中光译.材料的疲劳.第二版,北京:国防工业出版社,1999:387) |
| [4] | Pearson S.Eng Fract Mech,1975; 7:235 |
| [5] | Maluf O,Milan M T,Spinelli D.J Mater Eng Perform,2004; 13:195 |
| [6] | Ueji R,Tsuji N,Minamino Y.Acta Mater,2002; 50:4177 |
| [7] | Mara N A,Sergueeva A V,Mara T D.Mater Sci Eng,2007; A463:238 |
| [8] | Jia G W,Hua L,Mao H J.J Mater Process Technol,2007;187-188:562 |
| [9] | Ma B,Tieu A K,Lu C,Jiang Z.J Mater Process Technol,2002; 125-126:657 |
| [10] | Yang B,Zhao Y X.Adv Mater Res,2012; 463:85 |
| [11] | Zhao Y X,Gao Q,Wang J N.Acta Metall Sin,2000; 36:931(赵永翔,高庆,王金诺.金属学报,2000; 36:931) |
| [12] | Zhao Y X,Gao Q,Wang J N.Acta Metall Sin,2000; 36:937(赵永翔,高庆,王金诺.金属学报,2000; 36:937) |
| [13] | Zhao Y X,Yang B,Gao Q.Nucl Power Eng,2003; 24:127(赵永翔,杨冰,高庆.核动力工程,2003; 24:127) |
| [14] | Zhao Y X,Yang B,Gao Q.Nucl Power Eng,2005; 26:584(赵永翔,杨冰,高庆.核动力工程,2005; 26:584) |
| [15] | Zhao Y X.PhD Thesis,Southwest Jiaotong University,Chengdu,1998(赵永翔.西南交通大学博士学位论文,成都,1998) |
| [16] | Zhao Y X,Gao Q,Wang J N.Fatigue Fract Eng Mater Struct,1999; 22:459 |
| [17] | Miller K J.Fatigue Fract Eng Mater Struct,1987; 10:75 |
| [18] | Miller K J.Fatigue Fract Eng Mater Struct,1987; 10:93 |
| [19] | Obrtlík K,Polák J,Hájek M,Va(s)ek A.Int J Fatigue,1997;19:471 |
| [20] | Luo J,Bowen P.Int J Fatigue,2004; 26:113 |
| [21] | Ortiz J,Cisilino A P,Otegui J L.Fatigue Fract Eng Mater Struct,2001; 24:591 |
| [22] | Ding C F,Liu J Z,Wu X R.J Aeronaut Mater,2005;25(6):11(丁传富,刘建中,吴学仁.航空材料学报,2005; 25(6):11) |
| [23] | Zhao Y X,Gao Q,Wang J N.Fatigue Fract Eng Mater Struct,1999; 22:469 |
| [24] | Zhao Y X.J Mater Sci Technol,2003; 19:129 |
| [25] | Yang B,Zhao Y X.Int J Fatigue,2012; 35:71 |
| [26] | Yang B,Zhao Y X.Key Eng Mater,2011; 474:979 |
| [27] | Yang B,Zhao Y X.Adv Mater Res,2010; 118:75 |
| [28] | Zhao Y X,Sun Y F,Gao Q.J Mech Strength,2001; 23:102(赵永翔,孙亚芳,高庆.机械强度,2001:23:102) |
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