摘要
采用铜模喷铸法制备了直径为2 mm的Zr65-xTixCu20Fe5Al10(x=0,2,4,6,8,摩尔分数)体系的块体非晶合金,利用X射线衍射仪、差热扫描量热仪、电子万能试验机和扫描电镜分析了Ti含量对合金体系的非晶形成能力以及力学性能的影响.结果表明,当x=2时,块体合金具有最好的非晶形成能力,其过冷液相区ΔTx为73 K、约化玻璃转变温度Trg为0.564,非晶形成能力参数γ为0.401,压缩强度为1 905 MPa,塑性变形量为12%,抗压强度及塑性变形能力均非常理想,大量剪切带形成是其力学性能提高的主要原因.
Abstract
The bulk Zr65-xTixCu20Fe5Al10(x=0,2,4,6,8)alloys with ϕ2 mm were prepared by injection copper mold casting.Effects of Ti addition on the amorphous forming ability and mechanical properties of Zr65-xTixCu20Fe5Al10(x= 0,2,4,6,8)alloy system were investigated by X-ray diffraction,differential scanning calorimeter,compression tests and scanning electron microscope.The results indicate that the alloy achieves optimal amorphous forming ability when x=2,where the supercooled liquid zone ΔTx,the reduced glass transition temperature Trg,the amorphous form-ing capacity parameter γ,the compressive strength,and the plastic deformation are 73 K,0.564,0.401,1 905 MPa and 12%,respectively,and the compressive strength and plastic deformation ability are desirable,which is attributed to the formation of a large number of shearing bands.
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