65-xTi xCu 17.5Fe 10Al 7.5 bulk metallic glasses with significantly enhanced glass-forming ability and mechanical properties]]>

摘要

We report the significant effect of Ti substitution on GFA and mechanical properties of Ni-free Zr-based BMGs. A series of Zr65-xTixCu17.5Fe10Al7.5(x?=?0, 2, 4, 6, 8) bulk alloys were fabricated by the injection copper-mold casting method, and new Zr65-xTixCu17.5Fe10Al7.5BMGs with Ti content of 2–6?at.% were developed. Both the GFA and mechanical properties of the Zr65-xTixCu17.5Fe10Al7.5alloys are significantly enhanced with the increase of Ti content up to 4?at.%. The as-prepared quinary Zr61Ti4Cu17.5Fe10Al7.5BMG shows the largest supercooled liquid region width of 86?K, compressive fracture strength of 1915?MPa and compressive plasticity of 11.4%, which are much higher than 38?K, 1745?MPa and 3.0% of the pristine Zr65Cu17.5Fe10Al7.5BMG.