摘要
采用铜模吸铸法制备(Zr_(0.761)Cu_(0.147)Ni_(0.092))_(93-x)Al_(7+x)(x=0,1,2,3,5,7(摩尔分数,%))块体非晶合金,采用同步示差扫描量热仪(DSC)、万能试验机和显微硬度计测试各试样的过冷液相区、压缩塑性和显微硬度,利用X射线衍射(XRD)和扫描电镜(SEM)等手段对其微观结构和力学性能的关系进行分析。结果表明:随着Al含量的增加,(Zr_(0.761)Cu_(0.147)Ni_(0.092))_(93-x)Al_(7+x)非晶合金的玻璃转变温度T_g、初始晶化温度T_x均呈现增大的趋势,而过冷液相区ΔT_x先增大后减小,在x=3时达到最大的94 K。合金塑性变形ε_p随着Al含量的增加先增大后减小,在x=3时达到最大值为15.82%;合金屈服强度σ_s和显微硬度HV都呈现增强的趋势,在x=7时取得最大值,分别为1713和4095 MPa。
Zr_（0.761）Cu_（0.147）Ni_（0.092））_（93-x）Al_（7＋x ）bulk amorphous alloys with x of 0,1,2,3,5,7（mole fraction,%）were prepared by copper mold casting method.The differential scanning calorimeter（DSC）,universal testing machine and micro-hardness tester were employed to detect the supercooled liquid region,mechanical properties and microhardness of the samples,respectively.Furthermore,the relationship between microstructures and mechanical properties of the BMGs was analyzed by X-ray diffraction（XRD）and scanning electron microscope（SEM）.The results show that,with the addition of the content of Al,the glass transition temperature T_g and initial crystallization temperature T_（x ）of（Zr_（0.761）Cu_（0.147）Ni_（0.092））_（93-x）Al_（7＋x）（x=0,1,2,3,5,7（mole fraction,%））amorphous alloys increase.But the supercooled liquid regionΔT_（x ）of amorphous alloys firstly increases and then decreases,and it reaches 94 K which is best in the supercooled liquid regionΔT_（x ）of the alloys when x=3.The plastic deformation increases first and then decreases with the Al content increasing and the plastic deformation reaches the highest value of 15.82%while x is 3.Along with the increase of the content of Al,the yield strengthσ_s and microhardness HV of the alloy have an enhanced trend,and both of them reach the highest value of 1713 and 4095 MPa while x is 7.
作者
张为
寇生中
艾亚军
孙卫民
赵燕春
李春燕
李广
ZHANG Wei, KOU Sheng-zhong, AI Ya-jun, SUN Wei-min, ZHAO Yan-chun, LI Chun-yan, LI Guang(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Chin)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2017年第12期2527-2534,共8页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51571105
51661017
51661016)
甘肃省自然科学基金资助项目(1606RJYA312)~~
关键词
锆基块体非晶合金
过冷液相区
塑性变形
显微硬度
Zr-based bulk amorphous alloy
supercooled liquid region
plastic deformation
microhardness
