Effect of trace Ni addition on microstructure,mechanical and corrosion properties of the extruded Mg-Gd-Y-Zr-Ni alloys for dissoluble fracturing tools  

作　　者：J.Wang T.Li H.X.Li Y.Z.Ma K.N.Zhao C.L.Yang J.S.Zhang 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Petroleum Equipment of RIPED,PetroChina,Beijing 100083,China [3]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China

出　　处：《Journal of Magnesium and Alloys》2021年第5期1649-1660,共12页镁合金学报（英文）

基　　金：The National Natural Science Foundation of China(Nos.51671017,51971020);the Major State Research and Development Program of China(No.2016YFB0300801);Beijing Municipal Natural Science Foundation(No.2202033);Beijing Laboratory of Metallic Materials and Processing for Modern Transportation;the fund of the State Key Laboratory of Solidification Processing in NWPU(No.SKLSP201835);the Fundamental Research Funds for the Central Universities(No.FRF-IC-19–010,FRF-IC-19–015);the Opening Research Fund of State Key Laboratory for Advanced Metals and Materials(2018-Z04)。

摘　　要：Magnesium alloys,a novel functional material for the fabrication of fracturing tools,are being paid more and more attentions recently due to their relatively high mechanical properties and fast dissolubility ability after fracturing.In this study,the novel extruded Mg-10Gd-3Y-0.3Zr-xNi alloys will be reported and their microstructure,mechanical and corrosion behaviors will be also studied.The results show that Ni contents influence phase precipitation behaviors.With adding 0.2 wt%Ni,a large amount of Zr_(7)Ni_(10)phases will be precipitated insidesα-Mg matrix,directly leading to degradation of strength and large corrosion rate.With further increasing Ni contents,the precipitation phases can be changed from Mg_(5)RE to 18R-LPSO structure,resulting in higher mechanical properties and faster corrosion rate.Moreover,adding Ni element also change the texture orientation by influencing the precipitation behavior of the alloys.The alloys invented in this paper have attained the highest compressive and tensile properties among all the reported dissoluble magnesium alloys.This work is beneficial in understanding the role of Ni in the magnesium alloys and provides more materials alternatives for the fabrication of dissoluble fracturing tools.

关 键 词：Dissoluble magnesium alloys MICROSTRUCTURE Mechanical properties Corrosion behaviors Fracturing tools 

分 类 号：TG146.22[一般工业技术—材料科学与工程]