摘要
为探究TC17钛合金超声喷丸强化应力场与表面形貌分布状态,结合仿真与试验分别探究了1.5mm与2.5mm直径弹丸对TC17合金的残余应力场、表面形貌的影响。结果表明,在同等喷丸强度下,受小尺寸弹丸冲击速度更快影响,采用1.5mm弹丸超声喷丸试样表面具有最高的残余压应力值分布,提高弹丸尺寸对试样沿深度方向应力场传播更有利,同时有助于降低残余应力及形貌分布的离散度,2.5mm弹丸试样在100μm与150μm深度下具有更高的残余压应力值,表面形貌分布更平缓。仿真值与试验值趋势相近,仿真模型可用于对超声喷丸试验过程中应力场与表面形貌分布状态的预测。
To explore the distribution of the stress field and surface morphology of TC17 titanium alloy after ultrasonic shot peening strengthening,the effects of shot peening with shots of 1.5 mm and 2.5 mm in diameter on the residual stress field and surface morphology of TC17 alloy were investigated through simulation and experiments.The results show that,under the same shot peening intensity,due to the higher impact velocity of the small-sized shots,the sample surface shot-peened with 1.5 mm shots has the highest distribution of compressive residual stress values.Increasing the shot size is more conducive to the propagation of the stress field of the sample in the depth direction.At the same time,it helps to reduce the dispersion of the residual stress and morphology distribution.As a result,the sample shot-peened with 2.5 mm shots has higher compressive residual stress values at depths of 100μm and 150μm,and the surface morphology distribution is smoother.The simulation values are in a similar trend to the experimental values,and the simulation model can be used to predict the distribution of the stress field and surface morphology during the ultrasonic shot peening test process.
作者
潘玉良
蔡晋
孟庆勋
张丽文
胡朕源
杨鑫彤
PAN Yu-liang;CAI Jin;MENG Qing-xun(AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043;College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136)
出处
《航空精密制造技术》
2025年第4期4-8,共5页
Aviation Precision Manufacturing Technology
基金
中国航发产学研合体资助项目(HF2L2019CXY024-1)。
关键词
超声喷丸
钛合金
残余应力
粗糙度
有限元
ultrasonic shot peening
titanium alloy
residual stress
roughness
finite element
