Zr基大块非晶合金的制备及力学性能

Preparation and mechanical properties of Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) bulk amorphous alloy

采用石墨坩埚电弧熔炼法制备了直径20mm、长90mm的Zr41.2Ti13.8Cu12.5Ni10Be22.5大块非晶合金;利用DSC和DTA测试了不同升温速度下非晶合金过冷液相区ΔTx和约化玻璃温度Tr,分析了约化玻璃温度Tr值与非晶形成能力间的关系;力学性能测试结果表明,该非晶合金具有远高于相关晶态金属的抗拉强度(1808MPa)、抗弯强度(3700MPa)、维氏硬度(580)以及良好的弹性(E=98GPa),并从微观结构角度对非晶态合金的优异性能机制进行了初步分析。

Bulk amorphous Zr41.2Ti13.8Cu12.5Ni10Be22.5alloy up to 20mm in diameter and 90mm in length was prepared successfuly by using graphite crucible in arc melting processThermal analysis with DSC and DTA was made to show the effect of heating rate on supercooled liquid region ΔTx and the relationship between reduced glass transition temperature Tr and glass forming ability of alloys illustratedTests of mechanical properties for the bulk amorphous alloys show high tensile strength (1 808MPa), high flexural strength (3 700MPa), high Vickershardness(580) and good elasticity(E=98GPa)The mechanism governing the excellent properties from the point of view of microstructure is analyzed