平均应力对6.8级螺栓材料的高周疲劳行为的影响
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摘要
研究了6.8级螺栓材料在不同恒定平均应力下的高周疲劳行为。结果表明:当外加恒定平均应力为76、229和380 MPa时,6.8级螺栓材料的疲劳强度分别为317、284和265 MPa;疲劳强度随外加恒定平均应力的增大而降低。绝大部分样品的疲劳裂纹萌生于样品表面,在长寿命区内,有少部分样品的疲劳裂纹从样品内部的夹杂物处萌生。
The high-cycle fatigue behavior of 6.8 grade bolt material under different constant average stresses was investigated. The results show that when the applied constant average stress is 76, 229 and 380 MPa, respectively, the fatigue strength of the 6.8 grade bolt material is 317, 284 and 265 MPa, respectively, and the fatigue strength decreases with the increase of the applied constant average stress. The fatigue crack of most specimens originates on the surface of the sample, and in the long-life region, the fatigue crack of a few specimens originates from the interior inclusions.
The high-cycle fatigue behavior of 6.8 grade bolt material under different constant average stresses was investigated. The results show that when the applied constant average stress is 76, 229 and 380 MPa, respectively, the fatigue strength of the 6.8 grade bolt material is 317, 284 and 265 MPa, respectively, and the fatigue strength decreases with the increase of the applied constant average stress. The fatigue crack of most specimens originates on the surface of the sample, and in the long-life region, the fatigue crack of a few specimens originates from the interior inclusions.
引文
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[2] 赵建平,张姚斌,王春耀.输电塔架联接螺栓横向振动试验研究[J].新疆大学学报:自然科学版,2018,35(2):243-247.ZHAO Jian-ping,ZHANG Yao-bin,WANG Chun-yao.Experimental study on lateral vibration of transmissiontowers using bolt[J].Journal of Xinjiang University:Natural Science Edition,2018,35(2):243-247.
[3] 闫琳,任娜,康建伟,等.浅析预紧力对螺栓强度的影响[J].汽车实用技术,2018(17):98-99.YAN Lin,REN Na,KANG Jian-wei,et al.Finite analysis of pre-tension force′ effects on bolt strength[J].Automobile Applied Technology,2018(17):98-99.
[4] 郭卫凡,唐文良.螺栓联接的预紧力与疲劳强度的讨论[J].科技视界,2013(23):65-66.GUO Wei-fan,TANG Wen-liang.A discussion of effect of preload on bolt joint fatigue strength[J].Science and Technology Vision,2013(23):65-66.
[5] 王晓梅.GB/T 699—2015《优质碳素结构钢》标准解析[J].模具技术,2017(3):44-47.WANG Xiao-mei.Analysis of GB/T 699—2015《Quality carbon structure steels》standard[J].Die and Mould Technology,2017(3):44-47.
[6] 中华人民共和国国家质量监督检验检疫总局.GB/T 6478—2015,冷镦和冷挤压用钢[S].北京:中国标准出版社,2015.General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China.GB/T 6478—2015,steels for cold heading and cold extruding[S].Beijing:Standards Press of China,2015.
[7] Wang B,Zhang Z J,Shao C W,et al.Improving the high-cycle fatigue lives of Fe-30Mn-0.9C twinning-induced plasticity steel through pre-straining[J].Metallurgical and Materials Transactions A,2015,46:3317-3323.
[8] Mughrabi H.Cyclic slip irreversibility and fatigue life:A microstructure-based analysis[J].Acta Materialia,2013,61(4):1197-1203.
[9] Li P,Li S X,Wang Z G,et al.Fundamental factors on formation mechanism of dislocation arrangements in cyclically deformed fcc single crystals[J].Progress in Materials Science,2011,56(3):328-377.
[10] Pang J C,Li S X,Wang Z G,et al.General relation between tensile strength and fatigue strength of metallic materials[J].Materials Science and Engineering A,2013,564:331-341.
[11] 庞建超.高强度金属材料的疲劳与断裂研究[D].沈阳:中国科学院金属研究所,2012.PANG Jian-chao.Investigation on fatigue and fracture of high-strength metallic materials[D].Shenyang:Institute of Metal Research,Chinese Academy of Sciences,2012.
[12] Wang B,Zhang P,Duan Q Q,et al.High-cycle fatigue properties and damage mechanisms of pre-strained Fe-30Mn-0.9C twinning-induced plasticity steel[J].Materials Science and Engineering A,2017,679:258-271.
[13] Wang B,Zhang P,Duan Q Q,et al.Optimizing the fatigue strength of 18Ni maraging steel through ageing treatment[J].Materials Science and Engineering A,2017,707:674-688.
[14] Frorrest P G.Fatigue of Metals[M].Oxford:Pergamon Press,1962.
[15] 束德林.工程材料力学性能[M].北京:机械工业出版社,2007.
[16] Wang W,Yan W,Duan Q Q,et al.Study on fatigue property of a new 2.8 GPa grade maraging steel[J].Materials Science and Engineering A,2010,527:3057-3063.
[17] Murakami Y,Usuki H.Quantitative evaluation of effects of non-metallic inclusions on fatigue strength of high strength steels.II:Fatigue limit evaluation based on statistics for extreme values of inclusion size[J].International Journal of Fatigue,1989,11(5):299-307.
[18] 李守新,翁宇庆,惠卫军,等.高强度钢超高周疲劳性能—非金属夹杂物的影响[M].北京:冶金工业出版社,2010.