研究了脉冲电流作用下40Cr钢淬火残余应力的消除.结果表明,当脉冲电流密度达到一定数值后,材料中的残余应力开始部分弛豫;当电流密度达到6.3 kA/mm2时,残余应力可在700μs的脉冲电流处理时间内完全消除,而试样的瞬时温升仅约为360℃.在脉冲电流作用下残余应力弛豫的主要原因,可能是电流的电致塑性效应降低了材料的屈服强度,试样在由快速加热产生的瞬时热压应力和残余应力的共同作用下发生了微量的塑性变形.
参考文献
| [1] | K.Heindlhofer,Evaluation of Residual Stress(New York,McGraw-Hill Book Company,INC.,1948)p.19 |
| [2] | ZHANG Dingquan,HE Jiawen,Residual Stress Analysis by X-ray Diffraction and Its Function(Xi'an,Xi'an Jiaotong University Press,1999)p.167(张定铨,何家文,材料中残余应力的X射线分析和作用(西安,西安交通大学出版社,1999)p.167) |
| [3] | F.Tang,A.L.Lu,J.F.Mei,H.Z.Fang,X.J.Luo,Research on residual stress reduction by a low frequency alternating magnetic field,J.Mater.Process.Technol.,74,255(1998) |
| [4] | A.L.Lu,F.Tang,X.J.Luo,J.F.Mei,H.Z.Fang,Research on residual-stress reduction by strong pulsed magnetic treatment,J.Mater.Process.Technol.,74,259(1998) |
| [5] | Y.I.Ragozin,I.V.Polyanin,A new express-method of residual stresses relief in metals and ceramics,in;Proc.4# Int.Conf.on Residual Stresses(Baltimore,USA,Pergamon Press,1994)p.926 |
| [6] | Y.I.Ragozin,I.V.Polyanin,A new technology for residual stresses removal,in:Proc.6# Int.Conf.on Residual Stresses(Oxford,U.K,IOM Communications Ltd.,London,2000)p.991 |
| [7] | GUO Xiaonan.The influence of strong electropulse on properties of brass and structure of carbon fiber,Ph.D Dissertation(Institute of Metal Research,Chinese Academy of Sciences,1999)(郭晓楠,高强电脉冲对黄铜性能和碳纤维结构的影响,博士学位论文(中国科学院金属研究所,1999)) |
| [8] | H.Conrad,A.F.Sprecher,Dislocations in Solids,edited by F.R.N.Nabarro(Amsterdam,Elsevier Science Publishers,1989)p.497 |
| [9] | O.V(O)hringer,Residual Stress,edited by E.Macherauch and V.Hank,(DGM,1986)p.47 |
| [10] | H.Conrad,J.White,D.Cao,X.P.Lu,A.F.Sprecher,Effect of electric current pulses on fatigue characteristics of polycrystalline copper,Mater.Sci.and Eng.,A145,1(1991) |
| [11] | S.D.Antolovich,H.Conrad,The effects of electric Currents and fields on deformation in metals,ceramics,and ionic materials:An interpretive survey,Mater.＆Manuf.Proc.,19(4),587(2004) |
| [12] | L.B.Zuev,V.E.Gromov,V.F.Kurilov,L.I.Gurevich.Dislocation mobility in Zn single crystals under current pulses.Dok.Akad.Nauk SSSR,84,239(1978) |
| [13] | S.H.Xiao,Y.Z.Zhou,J.D.GUO,S.D.Wu G.Yao,S.X.Li,G.H.He,B.L.Zhou,The effect of high current pulsing on persistent slip bands in fatigued copper single crystals,Mater.Sci.Eng.,A332,351(2002) |
| [14] | O.A.Troitskii,V.I.Likhtman,Anisotropy of the effect of electron-beam and-ir-radiation on the deformation process of zinc single crystals in the brittle state,Dokl.Akad.Nauk SSSR,148,332(1963) |
| [15] | D.W.Tang,B.L.Zhou,H.Cao,G.H.He,Thermal stress relaxation behavior in thin films under transient laser-pulse heating,J.Appl.Phys.,73(8),3749(1993) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%