Formation, Thermal Stability and Mechanical Properties of New Amorphous Al89Fe10Zr1 Alloy
Formation, Thermal Stability and Mechanical Properties of New Amorphous Al89Fe10Zr1 Alloy
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新型非晶Al89Fe10Zr1合金的形成、热稳定性及力学性能
DOI：
10.2320/matertrans1989.39.866
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Inoue
中科院分区：
文献类型：
--
作者：
H. Kimura;Litsumin Wang;A. Inoue
采用不含稀土元素的快淬Al 89 Fe 10 Zr 1合金制备了一种抗拉强度高、弯曲塑性好的新型非晶合金。在无Ln的Al基合金中，用于玻璃形成的Al含量被认为是最高的。当Fe含量降低到7- 9at%时，淬火相转变为非晶相和fcc-Al相的混合结构，Al相的粒径在7%Fe时为40 nm，在8%Fe时为10 nm，在9%Fe时为5 nm。混合相合金还具有良好的弯曲塑性。非晶Al 89 Fe 10 Zr 1合金的拉伸断裂强度（σ f）为1050 MPa，而Fe含量为7 ~ 9%的混合相合金的σ f则降至720-1000 MPa。非晶合金的晶化过程为Am→Am+Al→Al+Al 3 Zr+Al 13 Fe 4两阶段反应，各阶段反应的起始温度分别为460和650 K。约20vol%Al相的析出使非晶合金的σ f提高到1220 MPa，而不影响其良好的塑性。无稀土Al-Fe-Zr合金具有高σ f和良好的弯曲塑性，其Al含量约为90%，可作为一种新的基础合金体系，用于生产低比重、低成本的高强度铝基合金。
A new amorphous alloy with high tensile strength and good bending ductility was fabricated from a melt-spun Al 89 Fe 10 Zr 1 alloy without the lanthanide (Ln) element. The Al content for glass formation is believed to be the highest in the Ln-free Al-based alloys. The as-quenched phase changes to a mixed structure of amorphous and fcc-Al phases with decreasing Fe content to 7-9 at%, and the particle size of the Al phase is 40 nm at 7%Fe, 10 nm at 8%Fe and 5 nm at 9%Fe. The mixed phase alloys also have good bending ductility. The tensile fracture strength (σ f ) is 1050 MPa for the amorphous Al 89 Fe 10 Zr 1 alloy and decreases to 720-1000 MPa for the mixed phase alloys with 7 to 9%Fe concentrations. The amorphous alloy crystallizes by two-stage reactions of Am→Am+Al→Al+Al 3 Zr+Al 13 Fe 4 and the onset temperature of each exothermic reaction is 460 and 650 K. The σ f of the amorphous alloy increases to 1220 MPa without detriment to good ductile nature by the precipitation of about 20 vol% Al phase. The achievement of high σ f combined with good bending ductility in the Ln-free Al-Fe-Zr alloys with the high Al concentration of about 90% is important as a new basic alloy system to produce a high-strength Al-based alloy with low specific weight and inexpensiveness.