Effect of shot-peening on low-cycle fatigue property of 18% Ni ultra-high strength steel
-
摘要: 对C250型18%Ni超高强度钢(C250钢)进行铸钢丸一次喷丸(单喷)和铸钢丸+玻璃丸二次喷丸(双喷),研究喷丸前后的表面形貌、显微组织和低周疲劳性能的变化.结果表明,单喷后C250钢低周疲劳寿命提高了接近2.5倍,而双喷后试样疲劳寿命提高3倍.喷丸表面的亚晶粒细化是提高低周疲劳性能的主要因素,二次喷丸带来的平滑化效果进一步提高了低周疲劳性能.平滑化效果减小了表面应力集中程度,使经过双喷后试样疲劳断口为单源疲劳断口,而未喷丸试样和单喷试样的低周疲劳断口呈现多源疲劳状态.
-
关键词:
- 喷丸强化 /
- 18%Ni型超高强度钢 /
- 低周疲劳 /
- 亚晶粒细化 /
- 疲劳断口
Abstract: 18% Ni ultra-high strength steel C250 was employed to investigate the effect of single shot peening (SSP) with cast-iron bead and double shot peening (DSP) with cast-iron bead and glass bead on surface topography, micro-structure and low-cycle fatigue (LCF). The results show that the low-cycle fatigue life has risen by nearly 2.5 times due to SSP, however, the low-cycle fatigue life after DSP increases by 3 times. Moreover, the sub-grain refinement after peening is the main factor which extends the LCF life, and the smooth surface caused by DSP promotes the LCF property. Furthermore, by comparison with fatigue fracture of unpeened and SSP sample presenting multi-source crack initiations, the DSP one fractured with only one source due to the smooth surface. -
[1] Rack H J, Kalish D.Improved fatigue resistance of 18Ni (350) maraging steel through thermomechanical treatments[J].Metallurgical Transactions,1974,5(3):685-694 [2] 航空工业部第二技术情报网.金属零件加工表 面完整性:译文集[M].[S.l.]:国营红旗机械厂,1983:20-30 The 2nd Technology Information Branch.Surface integrity of metal parts[M].[S.l.]:Hongqi Machinery Factroy,1983:20-30(in Chinese) [3] Miková K, Bagherifard S,Bokuvka O,et al.Fatigue behavior of X70 microalloyed steel after severe shot peening[J].International Journal of Fatigue,2013,55:33-42 [4] Soady K A. Life assessment methodologies incorporating shot peening process effects:mechanistic consideration of residual stresses and strain hardening Part 1:effect of shot peening on fatigue resistance[J].Materials Science and Technology,2013, 29(6): 637-651 [5] 白杰. 10CrNi4MoVA钢的低周疲劳性能研究[C]//第十届全国疲劳与断裂学术会议论文集.北京:中国力学学会,2000:214-217 Bai Jie.Research on low cycle fatigue of 10CrNi4MoVA steel[C]//The 10th fatigue and fracture conference.Beijing:The Chinese Society of Theoretical and Applied Mechanics,2000:214-217(in Chinese) [6] 张海风,施惠基. 表面再结晶层对DZ4定向凝固合金低周疲劳性能影响[J].航空材料学报,2006,26(1):71-75 Zhang Haifeng,Shi Huiji.Effect of recrystallization on low-cycle fatigue behavior of DZ4 directionally-solidified superalloy[J].Journal of Aeronautical Material,2006,26(1):71-75(in Chinese) [7] 薛蕾,陈静, 林鑫,等.激光成形修复TC4合金锻件的低周疲劳性能[J].稀有金属材料与工程,2011,40(7):1225-1229 Xue Lei,Chen Jing,Lin Xin,et al.Low cycle fatigue property of laser forming repaired TC4 forgings[J].Rare Metal Materials and Engineering,2011,40(7):1225-1229(in Chinese) [8] Altenberger I, Nalla R K,Sano Y,et al.On the effect of deep-rolling and laser-peening on the stress-controlled[J].International Journal of Fatigue,2012,44:292-302 [9] Bhuiyana S, Mutohb Y,McEvilyc A J.The influence of mechanical surface treatments on fatigue behavior of extruded AZ61 magnesium alloy[J].Materials Science and Engineering A,2012,549:69-75 [10] 王欣,蔡建明, 王强,等.喷丸表面覆盖率对于Ti60高温钛合金疲劳性能的影响[J].中国表面工程,2011,24(5): 58-63,103 Wang Xin,Cai Jianming, Wang Qiang,et al.Effect of shot peening coverage on fatigue property in Ti60 high-temperature titanium alloy[J].China Surface Engineering,2011,24(5):58-63,103(in Chinese) [11] Kawagoishi N, Nagano T,Moriyama M,et al.Improvement of fatigue strength of maraging steel by shot peening[J].Materials and Manufacturing Processes,2009,24(12):1431-1435
点击查看大图
计量
- 文章访问数: 1233
- HTML全文浏览量: 101
- PDF下载量: 517
- 被引次数: 0