表面微喷丸对CuNi<sub>2</sub>Si合金疲劳短裂纹行为影响

杨冰; 冯博; 李一帆; 廖贞; 张继旺; 肖守讷; 阳光武; 朱涛

doi:10.19818/j.cnki.1671-1637.2021.04.012

表面微喷丸对CuNi₂Si合金疲劳短裂纹行为影响

doi: 10.19818/j.cnki.1671-1637.2021.04.012

西南交通大学牵引动力国家重点实验室，四川成都 610031

基金项目:

国家自然科学基金项目 51675446

国家自然科学基金项目 U1534209

详细信息

作者简介:
杨冰(1979-)，男，湖南衡阳人，西南交通大学研究员，工学博士，从事车辆结构强度及材料疲劳与断裂研究

中图分类号: U270.4
计量
- 文章访问数: 381
- HTML全文浏览量: 103
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-10
- 网络出版日期: 2021-09-16
- 刊出日期: 2021-08-01

Influence of surface micro shot peening on short fatigue crack behavior of CuNi₂Si alloy

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

Funds:

National Natural Science Foundation of China 51675446

National Natural Science Foundation of China U1534209

More Information

Author Bio:
YANG Bing(1979-), male, professor, PhD, yb@swjtu.edu.cn

摘要

摘要: 在拉压载荷作用下，分别开展了CuNi₂Si合金微喷丸前后漏斗型圆棒试样的疲劳短裂纹复型试验；试验在预先确定的一系列载荷循环周次中断，以使用醋酸纤维膜对试样表面进行复型，进而采用逆序观察法获取了短裂纹萌生与扩展相关数据。分析结果表明：2种试样疲劳裂纹均萌生于试样表面，裂纹扩展受微观组织影响呈现曲折性增长, 整体表现出初期增长缓慢，后期裂纹长度迅速增长至试样断裂的趋势, 失稳扩展临界尺度约为750.0 μm; 微喷丸处理可以使裂纹增长模式由以晶间为主转为以穿晶为主，微喷丸前后断口形貌表现出巨大差异，相对未喷丸试样，微喷丸试样裂纹萌生位置呈现较大的晶体平面，无明显晶粒特征，裂纹源区面积较小，在疲劳过程中产生的纤维条纹数量较多，瞬断区韧窝形貌更为明显; 经微喷丸处理后，试样平均疲劳寿命提高约31.5倍，裂纹萌生和缓慢扩展阶段占比从整体疲劳寿命的60%增加至80%，可知微喷丸处理对于疲劳寿命的大幅提高主要体现在短裂纹的萌生和稳定扩展阶段，而这种强化效果主要受表面有效应力、硬度、晶界数目的共同影响，但该强化效果对疲劳裂纹扩展后期影响不大。
- 车辆工程 /
- 裂纹复型 /
- CuNi₂Si合金 /
- 疲劳短裂纹 /
- 微喷丸 /
- 裂纹扩展
Abstract: Under tension-compression loading, the fatigue short crack replica tests of funnel-shaped round bar specimens of CuNi₂Si alloy with/without micro-shot peening were carried out, respectively. Tests were interrupted at a series of predetermined load cycles to replicate the surface of the specimen with acetate film, and then the data related to short crack initiation and propagation were obtained by using the reverse order observation method. Analysis results show that the fatigue cracks of both types of specimens initiate on the surface. The crack shows a zigzag growth under the influence of microstructure. In general, it shows a trend of slow growth in the early stage followed by a rapid growth in the later stage until the fracture of the specimen, with a critical instability crack propagation size of about 750.0 μm. With the introduction of micro shot peening technology, the crack growth process changes from the intergranular mode to the transgranular mode. The fracture morphologies of specimens with/without micro shot peening are very different. Compared to un-peening specimens, micro shot peening specimens show a larger crystal plane in the crack initiation position without obvious grain characteristics. They show smaller crack source area, larger number of fatigue stripes produced in the fatigue process, and more obvious dimple morphology in the instantaneous fracture area. After micro shot peening, the average fatigue life of the specimens increases approximately 31.5 times, and the fatigue life proportion occupied by the stage of crack initiation and slow growth increases from 60% to 80%, indicating that the significant increase in fatigue life is mainly reflected in the initiation and stable propagation stage of short cracks. The strengthening effect is mainly affected by the surface effective stress, hardness, and the number of grain boundaries, but it has little effect on the later stage of fatigue crack growth. 3 tabs, 11 figs, 30 refs.
- vehicle engineering /
- crack replica /
- CuNi₂Si alloy /
- fatigue short crack /
- micro shot peening /
- crack propagation

HTML全文

图 1 疲劳试样形状与尺寸(单位：mm)

Figure 1. Fatigue specimen shape and dimensions (unit: mm)

下载: 全尺寸图片幻灯片

图 2 三维表面形貌

Figure 2. Three dimensional surface morphologies

下载: 全尺寸图片幻灯片

图 3 UP-2试样复型照片

Figure 3. Replica photos of specimen UP-2

下载: 全尺寸图片幻灯片

图 4 MSP-1试样复型照片

Figure 4. Replica photos of specimen MSP-1

下载: 全尺寸图片幻灯片

图 5 UP试样断口形貌

Figure 5. Fracture morphology of UP specimen

下载: 全尺寸图片幻灯片

图 6 MSP试样断口形貌

Figure 6. Fracture morphology of MSP specimen

下载: 全尺寸图片幻灯片

图 7 裂纹长度随循环次数的变化曲线

Figure 7. Variation curves of crack length and cycle

下载: 全尺寸图片幻灯片

图 8 裂纹长度随寿命分数变化曲线

Figure 8. Variation curves of crack length and life fraction

下载: 全尺寸图片幻灯片

图 9 裂纹扩展率随裂纹长度变化

Figure 9. Relationships between crack growth rate and crack length

下载: 全尺寸图片幻灯片

图 10 裂尖形状假设

Figure 10. Hypothesis of crack tip shape

下载: 全尺寸图片幻灯片

图 11 裂纹扩展率随应力强度因子范围变化曲线

Figure 11. Variation curves between crack growth rates and stress intensity factors

下载: 全尺寸图片幻灯片

表 1 CuNi₂Si合金化学成分质量百分比

Table 1. Quality percentages of chemical composition of CuNi₂Si alloy %

Cu	97.500	Si	0.482
Fe	0.140	Sn	0.033
Mn	< 0.001	P	0.012
Ni	1.750	Al	0.002
Pb	0.001	Zn	0.026

下载: 导出CSV

表 2 试样表面微喷丸处理条件

Table 2. MSP treatment condition of sample surface

丸粒尺寸/ μm	喷射压强/ MPa	喷射距离/ mm	弧高值(N型)/mm	覆盖率/ %
40.0	0.4	100	0.12	> 200

下载: 导出CSV

表 3 试样疲劳寿命

Table 3. Fatigue lives of specimens

试样	组别	疲劳寿命/次	寿命均值/次
UP试样	UP-1	6 500	31 100
	UP-2	59 900
	UP-3	16 000
	UP-4	42 000
MSP试样	MSP-1	122 400	979 300
	MSP-2	995 900
	MSP-3	542 800
	MSP-4	2 256 100

下载: 导出CSV

参考文献(30)

[1]	LEI Qian, XIAO Zhu, HU Wei-ping, et al. Phase transformation behaviors and properties of a high strength Cu-Ni-Si alloy[J]. Materials Science and Engineering: A, 2017, 697: 37-47. doi: 10.1016/j.msea.2017.05.001
[2]	MONZEN R, WATANABE C. Microstructure and mechanical properties of Cu-Ni-Si alloys[J]. Materials Science and Engineering: A, 2008, 483/484: 117-119. doi: 10.1016/j.msea.2006.12.163
[3]	LOCKYER S A, NOBLE F W. Fatigue of precipitate strengthened Cu-Ni-Si alloy[J]. Materials Science and Technology, 1999, 15(10): 1147-1153. doi: 10.1179/026708399101505194
[4]	LEI Qian, LI Zhou, HAN Liang, et al. Effect of aging time on the corrosion behavior of a Cu-Ni-Si alloy in 3.5 wt% NaCl solution[J]. Corrosion Houston Tx, 2016, 72(5): 615-627. doi: 10.5006/1884
[5]	TANG Xing-ying, WANG Shu-zhong, QIAN Li-li, et al. Corrosion behavior of nickel base alloys, stainless steel and titanium alloy in supercritical water containing chloride, phosphate and oxygen[J]. Chemical Engineering Research and Design, 2015, 100: 530-541. doi: 10.1016/j.cherd.2015.05.003
[6]	ZHAO X H, HAN Y, BAI Z Q, et al. The experiment research of corrosion behaviour about Ni-based alloys in simulant solution containing H ₂S/CO ₂[J]. Electrochimica Acta, 2011, 56(22): 7725-7731. doi: 10.1016/j.electacta.2011.05.116
[7]	杨留有, 邵建方, 杨庆和. 关于高铁接触网定位线夹脱落问题的分析及建议[J]. 铁道机车车辆, 2014, 34(3): 141-144. doi: 10.3969/j.issn.1008-7842.2014.03.35 YANG Liu-you, SHAO Jian-fang, YANG Qing-he. Analysis and recommendations for high-speed rail catenary positioning clamp shedding problem[J]. Railway Locomotive and CAR, 2014, 34(3): 141-144. (in Chinese) doi: 10.3969/j.issn.1008-7842.2014.03.35
[8]	GŁUCHOWSKI W, RDZAWSKI Z, SOBOTA J, et al. Effect of the combined heat treatment and severe plastc deformation on the microstructure of CuNiSi alloy[J]. Archives of Metallurgy and Materials, 2016, 61(2): 1207-1214. doi: 10.1515/amm-2016-0200
[9]	LEI Qian, LI Zhou, GAO Yang, et al. Microstructure and mechanical properties of a high strength Cu-Ni-Si alloy treated by combined aging processes[J]. Journal of Alloys and Compounds, 2017, 695: 2413-2423. doi: 10.1016/j.jallcom.2016.11.137
[10]	TAN De-qiang, MO Ji-liang, PENG Jin-fang, et al. Research and prospect on high-speed catenary component failure[J]. Journal of Southwest Jiaotong University, 2018, 53(3): 610-619. http://www.researchgate.net/publication/327673361_Research_and_Prospect_on_High-Speed_Catenary_Component_Failure
[11]	ATAPEK S H, PANTELAKIS S G, POLAT S. Fractographical analysis of fatigue failed Cu-2.55Ni-0.55Si alloy[J]. Theoretical and Applied Fracture Mechanics, 2016, 83: 60-66. doi: 10.1016/j.tafmec.2015.12.015
[12]	SUN Z, LAITEM C, VINCENT A. Dynamic embrittlement during fatigue of a Cu-Ni-Si alloy[J]. Materials Science and Engineering: A, 2011, 528(19/20): 6334-6337. http://www.sciencedirect.com/science/article/pii/S0921509311005016
[13]	LOCKYER S A, NOBLE F W. Fatigue of precipitate strengthened Cu-Ni-Si alloy[J]. Materials Science and Technology, 1999, 15(10): 1147-1153. doi: 10.1179/026708399101505194
[14]	GOTO M, HAN S Z, LIM S H, et al. Role of microstructure on initiation and propagation of fatigue cracks in precipitate strengthened Cu-Ni-Si alloy[J]. International Journal of Fatigue, 2016, 87: 15-21. doi: 10.1016/j.ijfatigue.2016.01.004
[15]	DELBOVE M, VOGT J B, BOUQUEREL J, et al. Low cycle fatigue behaviour of a precipitation hardened Cu-Ni-Si alloy[J]. International Journal of Fatigue, 2016, 92: 313-320. doi: 10.1016/j.ijfatigue.2016.07.019
[16]	王华强, 吴明泽, 张继旺, 等. 预冷变形对Cu-Ni-Si铜合金疲劳性能和破坏行为影响研究[J]. 实验力学, 2018, 33(6): 877-884. https://www.cnki.com.cn/Article/CJFDTOTAL-SYLX201806006.htm WANG Hua-qiang, WU Ming-ze, ZHANG Ji-wang, et al. On the effect of precooling deformation on fatigue performance and failure behavior of Cu-Ni-Si alloy[J]. Journal of Experimental Mechanics, 2018, 33(6): 877-884. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SYLX201806006.htm
[17]	YANG Bing, WU Ming-ze, LI Xing, et al. Effects of cold working and corrosion on fatigue properties and fracture behaviors of precipitate strengthened Cu-Ni-Si alloy[J]. International Journal of Fatigue, 2018, 116: 118-127. doi: 10.1016/j.ijfatigue.2018.06.017
[18]	ZHANG Ji-wang, LI Xing, YANG Bing, et al. Effect of micro-shot peening on fatigue properties of precipitate strengthened Cu-Ni-Si alloy in air and in salt atmosphere[J]. Surface and Coatings Technology, 2019, 359: 16-23. doi: 10.1016/j.surfcoat.2018.12.035
[19]	刘宇轩, 吴圣川, 李存海, 等. 轴箱内置型铁路车轴疲劳性能与寿命评估[J]. 交通运输工程学报, 2019, 19(3): 100-108. http://transport.chd.edu.cn/oa/DArticle.aspx?type=view&id=201903011 LIU Yu-xuan, WU Sheng-chuan, LI Cun-hai, et al. Fatigue performance and life assessment of railway axle with inside axle box[J]. Journal of Traffic and Transportation Engineering, 2019, 19(3): 100-108. (in Chinese) http://transport.chd.edu.cn/oa/DArticle.aspx?type=view&id=201903011
[20]	QIN Ya-hang, YANG Bing, FENG Bo, et al. Effect of periodic overloads on short fatigue crack behavior in CuNi ₂Si alloy under rotating bending load[J]. Metals—Open Access Metallurgy Journal, 2020, 10(9): 1267. http://www.researchgate.net/publication/345245026_Effect_of_Periodic_Overloads_on_Short_Fatigue_Crack_Behavior_in_CuNi2Si_Alloy_under_Rotating_Bending_Load
[21]	YANG Bing, LI Yi-fan, QIN Ya-hang, et al. Fatigue crack growth behavior of precipitate-strengthened CuNi ₂Si alloy under different loading modes[J]. Materials, 2020, 2228(13): 1-14. http://www.researchgate.net/publication/341332619_Fatigue_Crack_Growth_Behaviour_of_Precipitate-Strengthened_CuNi2Si_Alloy_under_Different_Loading_Modes
[22]	PANG H T, REED P A S. Effects of microstructure on room temperature fatigue crack initiation and short crack propagation in Udimet 720Li Ni-base superalloy[J]. International Journal of Fatigue, 2008, 30(10/11): 2009-2020. http://www.sciencedirect.com/science/article/pii/S0142112308000042
[23]	YANG Bing, ZHAO Yong-xiang. Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel[J]. International Journal of Fatigue, 2012, 35(1): 71-78. doi: 10.1016/j.ijfatigue.2010.11.012
[24]	杨冰, 廖贞, 马佰全, 等. 两种加载频率下LZ50车轴钢疲劳短裂纹行为对比[J]. 交通运输工程学报, 2017, 17(6): 46-55. http://transport.chd.edu.cn/oa/DArticle.aspx?type=view&id=201706006 YANG Bing, LIAO Zhen, MA Bai-quan, et al. Comparison of short fatigue crack behaviors for LZ50 axle steel under two loading frequencies[J]. Journal of Traffic and Transportation Engineering, 2017, 17(6): 46-55. (in Chinese) http://transport.chd.edu.cn/oa/DArticle.aspx?type=view&id=201706006
[25]	ZHAO Yong-xiang, YANG Bing, ZHANG Wei-hua. A short fatigue crack growth law for 1Cr18Ni9Ti weld metal[J]. Key Engineering Materials, 2006, 324/325: 571-578. doi: 10.4028/www.scientific.net/KEM.324-325.571
[26]	张继旺, 鲁连涛, 张卫华. 微粒子喷丸中碳钢疲劳性能分析[J]. 金属学报, 2009, 45(11): 1378-1383. doi: 10.3321/j.issn:0412-1961.2009.11.017 ZHANG Ji-wang, LU Lian-tao, ZHANG Wei-hua. Analysis on fatigue property of microshot peened medium carbon steel[J]. Acta Metallurgica Sinica, 2009, 45(11): 1378-1383. (in Chinese) doi: 10.3321/j.issn:0412-1961.2009.11.017
[27]	DENG Guo-jian, TU Shan-tung, ZHANG Xian-cheng, et al. Grain size effect on the small fatigue crack initiation and growth mechanisms of nickel-based superalloy GH4169[J]. Engineering Fracture Mechanics, 2015, 134: 433-450. doi: 10.1016/j.engfracmech.2015.01.002
[28]	MURAKAMI Y, ENDO M. Effects of defects, inclusions and inhomogeneities on fatigue strength[J]. International Journal of Fatigue, 1994, 16(3): 163-182. doi: 10.1016/0142-1123(94)90001-9
[29]	LORENZINO P, BUFFIERE J Y, VERDU C. 3D characterization of the propagation of small fatigue cracks in steels with different forging conditions[J]. International Journal of Fatigue, 2018, 115: 2-10. doi: 10.1016/j.ijfatigue.2018.06.042
[30]	ZHANG Ji-wang, LI Hang, YANG Bing, et al. Fatigue properties and fatigue strength evaluation of railway axle steel: effect of micro-shot peening and artificial defect[J]. International Journal of Fatigue, 2020, 132: 105379. doi: 10.1016/j.ijfatigue.2019.105379