超声冲击处理对316LN不锈钢残余应力影响的数值模拟
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摘要
采用超声冲击处理技术对316LN奥氏体不锈钢试样进行残余应力模拟分析,得出不同影响因素对残余应力的影响。采用有限元分析软件ABAQUS模拟了超声冲击处理对316LN奥氏体不锈钢的冲击过程,分析了不同的冲击针形状和尺寸、冲击功率以及冲击次数等参数的影响。结果表明,平头针超声冲击产生的应力场较圆头针均匀,而圆头针产生的残余应力数值较大,φ5mm平头针产生的残余应力范围略>φ4mm平头针;提高冲击次数,应力场数值和范围均有显著增加,冲击3次后产生的残余压应力值为0.5MPa,约为单次冲击后的2倍,但继续将冲击次数增加到6次时产生的残余应力较冲击3次后产生的残余应力变化并不大;随着冲击功率的增加,残余应力场的数值和范围也逐渐增加,但增加的幅度并不明显。通过对不同冲击因素进行研究,发现了超声冲击对于提高材料表面残余应力的有效性,可为今后工艺优化提供一定的依据支持。
By measure of the residual stress of ultrasonic impact treatment(UIT),the influences of different influencing factors of the residual stress are found out.An ABAQUS Finite element model is employed to analyze the distribution of residual stress field in 316 LN austenite steel induced by UIT.In the model,the UIT pin size and shape,impact power and time are considered.The result shows that the flathead pin can produce residual stress more uniformly compared with bullethead pin,but the bullethead pin has bigger value.The residual stress range produced by 5mm flathead pin is more than4 mm flathead pin.In addition,increasing the impact time has significant effect on residual stress value and range,and the value of impact three times is 0.5MPa.It is double effect of impact once,but the effect is not obviously when continuously increasing the impact times to the six.Along with the increasing of the impact power,the value and range of residual stress increases slightly.By study of the different influencing factor,the validity of the residual stress is found.It can provide some basis support for process optimization.
By measure of the residual stress of ultrasonic impact treatment(UIT),the influences of different influencing factors of the residual stress are found out.An ABAQUS Finite element model is employed to analyze the distribution of residual stress field in 316 LN austenite steel induced by UIT.In the model,the UIT pin size and shape,impact power and time are considered.The result shows that the flathead pin can produce residual stress more uniformly compared with bullethead pin,but the bullethead pin has bigger value.The residual stress range produced by 5mm flathead pin is more than4 mm flathead pin.In addition,increasing the impact time has significant effect on residual stress value and range,and the value of impact three times is 0.5MPa.It is double effect of impact once,but the effect is not obviously when continuously increasing the impact times to the six.Along with the increasing of the impact power,the value and range of residual stress increases slightly.By study of the different influencing factor,the validity of the residual stress is found.It can provide some basis support for process optimization.
引文
[1]许斌,王庆田,李宁,等.新一代反应堆堆内构件材料[J].特钢技术,2012,18(3):1-3.
[2]罗毅军.反应堆冷却剂主管道316LN新型管材替代321管材的可行性研究[J].核动力工程,2013,34(5):80-83.
[3]Wang S L,Yang B,Zhang M X,et al.Numerical simulation and experimental verification of microstructure evolution in large forged pipe used for AP1000nuclear power plants[J].Annals of Nuclear Energy,2016,87(2):176-185.
[4]朱有利,王燕礼,边飞龙,等.金属材料超声表面强化技术的研究与应用进展[J],机械工程学报,2014(20):35-45.
[5]黄加强,万正权,卞如冈,等.高强钢焊接接头超声冲击效果对比试验研究[J].船舶力学,2012,16(10):1164-1171.
[6]张晓,邵军,姚润钢,等.超声冲击改善高强钢焊接接头残余应力的数值模拟分析[J].材料开发与应用,2009,24(2):4-6.
[7]王东坡,霍立兴,葛宝文,等.超声冲击法改善高强钢焊接接头的疲劳性能[J].中国造船,2003,44(4):86-92.
[8]Fan Y J,Zhao X H,Liu Y.Research on fatigue behavior of the flash welded joint enhanced by ultrasonic peening treatment[J].Materials&Design,2016,94:515-522.
[9]Ramos R,Ferreira N,Ferreira J A M,et al.Improvement in fatigue life of Al 7475-T7351alloy specimens by applying ultrasonic and microshot peening[J].International Journal of Fatigue,2016,92:87-95.
[10]贾翠玲,陈芙蓉.超声冲击处理对7A52铝合金焊接应力影响的数值模拟[J].焊接学报,2015(4):30-34.
[11]陈芙蓉,赵永胜,邱小明,等.超声冲击处理对7A52铝合金焊接接头表层组织及性能的影响[J].表面技术,2015(6):49-53.
[12]Kumar S,Chattopadhyay K,Mahobia G S,et al.Hot corrosion behaviour of Ti-6Al-4V modified by ultrasonic shot peening[J].Materials&Design,2016,110:196-206.
[13]李进一.超声冲击对纯钛材焊接接头疲劳性能的影响[J].材料保护,2015,48(12):53-56.
[14]王东坡,霍立兴,张玉凤.超声冲击法对钛合金焊接接头疲劳性能的改善[J].中国有色金属学报,2003,13(6).
[15]蒋聪盈,黄露,王婧辰,等.TC4钛合金激光冲击强化与喷丸强化的残余应力模拟分析[J].表面技术,2016,45(4):5-9,52.
[16]刘杰,周志明,涂坚,等.激光表面处理CuCr50合金的显微组织及性能[J].表面技术,2016,45(5):169-174.
[17]李进一,凌祥,周建新.超声冲击残余应力场的有限元模拟[J].航空材料学报,2012,32(1):84-88.
[2]罗毅军.反应堆冷却剂主管道316LN新型管材替代321管材的可行性研究[J].核动力工程,2013,34(5):80-83.
[3]Wang S L,Yang B,Zhang M X,et al.Numerical simulation and experimental verification of microstructure evolution in large forged pipe used for AP1000nuclear power plants[J].Annals of Nuclear Energy,2016,87(2):176-185.
[4]朱有利,王燕礼,边飞龙,等.金属材料超声表面强化技术的研究与应用进展[J],机械工程学报,2014(20):35-45.
[5]黄加强,万正权,卞如冈,等.高强钢焊接接头超声冲击效果对比试验研究[J].船舶力学,2012,16(10):1164-1171.
[6]张晓,邵军,姚润钢,等.超声冲击改善高强钢焊接接头残余应力的数值模拟分析[J].材料开发与应用,2009,24(2):4-6.
[7]王东坡,霍立兴,葛宝文,等.超声冲击法改善高强钢焊接接头的疲劳性能[J].中国造船,2003,44(4):86-92.
[8]Fan Y J,Zhao X H,Liu Y.Research on fatigue behavior of the flash welded joint enhanced by ultrasonic peening treatment[J].Materials&Design,2016,94:515-522.
[9]Ramos R,Ferreira N,Ferreira J A M,et al.Improvement in fatigue life of Al 7475-T7351alloy specimens by applying ultrasonic and microshot peening[J].International Journal of Fatigue,2016,92:87-95.
[10]贾翠玲,陈芙蓉.超声冲击处理对7A52铝合金焊接应力影响的数值模拟[J].焊接学报,2015(4):30-34.
[11]陈芙蓉,赵永胜,邱小明,等.超声冲击处理对7A52铝合金焊接接头表层组织及性能的影响[J].表面技术,2015(6):49-53.
[12]Kumar S,Chattopadhyay K,Mahobia G S,et al.Hot corrosion behaviour of Ti-6Al-4V modified by ultrasonic shot peening[J].Materials&Design,2016,110:196-206.
[13]李进一.超声冲击对纯钛材焊接接头疲劳性能的影响[J].材料保护,2015,48(12):53-56.
[14]王东坡,霍立兴,张玉凤.超声冲击法对钛合金焊接接头疲劳性能的改善[J].中国有色金属学报,2003,13(6).
[15]蒋聪盈,黄露,王婧辰,等.TC4钛合金激光冲击强化与喷丸强化的残余应力模拟分析[J].表面技术,2016,45(4):5-9,52.
[16]刘杰,周志明,涂坚,等.激光表面处理CuCr50合金的显微组织及性能[J].表面技术,2016,45(5):169-174.
[17]李进一,凌祥,周建新.超声冲击残余应力场的有限元模拟[J].航空材料学报,2012,32(1):84-88.