再结晶重熔法与半固态等温处理法对Ti_(48)Zr_(18)V_(12)Cu_5Be_(17)非晶复合材料组织和性能影响  

Effects of Recrystallization and Partial Remelting and Semi-solid Isothermal Treatment on Microstructure and Mechanical Properties of Ti_(48)Zr_(18)V_(12)Cu_5Be_(17) Metallic Glasses Composites

作　　者：朱麟浩 郭洪民[1,2] 金华兰 黄新华[2] 杨湘杰 Zhu Linhao;Guo Hongmin;Jin Hualan;Huang Xinhua;Yang Xiangjie(School of Materials Science and Engineering,Nanchang University;Key Laboratory of Near-net Forming in Jiangxi Province)

机构地区：[1]南昌大学材料科学与工程学院,南昌330031 [2]江西省高性能精确成形实验室

出　　处：《特种铸造及有色合金》2021年第5期625-628,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51674144);江西省自然科学基金重点资助项目(20133ACB21003)。

摘　　要：以Ti_(48)Zr_(18)V_(12)Cu_5Be_(17)非晶复合材料为基础,研究了半固态等温处理(SSIT)和再结晶重熔法(RAP)对材料组织和性能的影响。结果表明,SSIT和RAP处理后材料并没有发生相变,但是组织由铸态细小枝晶转变为半固态粗大条状晶和近球晶,RAP法处理后材料组织由于再结晶,相较于半固态更加细小和圆整。RAP材料塑性最佳(20.43%),比SSIT提升了8.27%,抗压强度(1829.45 MPa)和屈服强度(1144.06 MPa)也高于半固态等温处理的。RAP材料断口可以观察到脉状纹络密度最大,3种材料还存在光滑区和熔滴。铸态材料剪切带容易穿透晶粒,半固态材料除了剪切带,晶粒内还存在大量滑移带,再结晶重熔材料非晶基体内剪切带传播受阻,多重剪切带萌生,晶粒内相互平行和交叉的滑移带表明晶粒能够吸收更多的能量,承受更大的塑性变形。Based on Ti_(48)Zr_(18)V_(12)Cu_5Be_(17) metallic glasses composite,the effects of semi-solid isothermal treatment(SSIT)and recrystallization and partial remelting(RAP)on the microstructure and properties of the amorphous composites were investigated.The results show that after SSIT and RAP,phase transformation is absent,however the microstructure is converted from small dendrites to coarse strip crystal and near-spherical crystal.Due to recrystallization,the microstructure of RAP is finer and rounder than that of SSIT.The RAP ed composites has the best plasticity(20.43%)which is 8.27%higher than that of SSIT and its compressive strength(1829.45 MPa)and yield strength(1144.06 MPa)are also higher.The fracture of RAP can be observed the maximum density of veins and smooth area and molten drop also exist in three kinds of materials.The shear bands of as-cast composited are easy to penetrate the grain.In addition to the shear band,there exsit a large number of slip bands in the grain of SSIT.The propagation of shear bands in the amorphous matrix of RAP is hindered and multiple shear bands are generated.The parallel and crossed slip bands in the grain indicate that the grain can absorb more energy and withstand greater plastic deformation.

关 键 词：再结晶重熔 半固态等温处理 非晶复合材料 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程] TG249.26[金属学及工艺—铸造]