|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 查看详情显示文摘 | Song Y.B Sun Y.X Zhang X.Z Zhou J.P.Zhang L.N | | 0，，： | 1 |
| 2 | Control of dislocation density maximizing precipitation strengthening effect显示文摘The strength-ductility trade-off has been the most challenging problem for structural metals for centuries.Nanoprecipitation strengthening is an ideal approach to enhance the strength without significantly sacrificing the ductility.Stable nanoprecipitates have been successfully acquired by nanostructural design,but the number density of nanoprecipitates cannot be further increased.Researchers attempted to enhance number density by introducing highly potent nucleation sites(e.g.,dislocations).However,there remains controversy over the influence of dislocations on the nucleation and growth of coherent nanoprecipitates with minimized nucleation barrier.Here,Cu-rich nanoprecipitates in an HSLA steel,as a typical type of coherent nanoprecipitates,are investigated.By combining analytical calculation and experiments,we show that dislocations are harmful for the formation of large numbered Cu-rich nanoprecipitates in a certain density range.Insufficient dislocations deprive solute atoms which decrease homogenous precipitation that cannot be compensated by the increase in heterogeneous precipitation.Under such circumstance,Cu-rich nanoprecipitates have smaller number density but larger size and higher fraction of incoherent structures due to rapid Ostwald ripening.As a result,by controlling dislocation density,the yield strength is increased by 24%without obvious loss in ductility as compared with traditional solution-quench-age process.Our work would help to optimize composition and processing routes that fully exploit the nanoprecipitation strengthening effect. | C.Xu W.J.Dai Y.Chen Z.X.Qi G.Zheng Y.D.Cao J.P.Zhang C.C.Bu G.Chen | 2022 | Journal of Materials Science & Technology2022，，32： | 1 |
| 3 | 查看详情显示文摘 | Wang Z. J Qu S. C Zeng X. B Liu J.P.Zhang C.S.Tan F.R.Jin L.Wang Z.G | | 0，，05： | 1 |
| 4 | INFLUENCES OF NEODYMIUM ON MAGNETIC CHARACTERISTICS OF ELECTROPLATING CoNdNiMnP FILMS显示文摘In order to improve the performances of electroplating permanent magnetic films, neodymium is introduced into the electroplating CoNiMnP permanent magnetic films. The influences of the neodymium content are also investigated by varying NdCl3 plating bath concentration. The neodymium-doped films are analyzed by energy dispersive spectrum (EDS), vibrating sample magnetometer (VSM) and magnetic force microscope (MFM). The experimental results show that high magnetic performances of CoNdNiMnP permanent magnetic films with vertical anisotropy could be fabricated with current density 5mA/cm2 at room temperature. With the increasing of neodymium contents, the magnetic properties of films were improved. However when neodymium contents exceeded 3.5wt%, the magnetic properties of films are not improved any more. The increase of film magnetic properties results from the ferromagnetic-coupling between light rare earth element-neodymium and transition metal element-cobalt. | H.C.Jiang W.L.Zhang J.P.Zhang W.X.Zhang B.Peng S.Q.Yang | 2005 | Acta Metallurgica Sinica(English Letters)2005，18，2： | 0 |
| 5 | THE INFLUENCES OF SOLUTION PH AND CURRENT DENSITY ON COERCIVITY OF ELECTROPLATING CoNdNiMnP PERMANENT MAGNETIC ALLOY FILM ARRAYS显示文摘The influences of plating bath solution PH and current density on coercivity of electroplating CoNdNiMnP permanent magnetic film arrays were studied. The experiment results show that both for solution PH and current density there were the best depositing parameters. Too high and too low plating bath solution PH or current density both result in decreasing of the film array coercivity. When solution PH is 3.5 and current density is 5mA/cm2, the prepared film array coercivity can reach the maximum. | H.C.Jiang W.L.Zhang J.P.Zhang W.X.Zhang B.Peng S.Q.Yang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员