High-strength Cu-based bulk glassy alloys in Cu-Zr-Ti and Cu-Hf-Ti ternary systems
High-strength Cu-based bulk glassy alloys in Cu-Zr-Ti and Cu-Hf-Ti ternary systems
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DOI：
10.1016/s1359-6454(01)00181-1
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发表时间：
2001-08-16
期刊：
影响因子：
9.4
通讯作者：
Kurosaka, K
中科院分区：
文献类型：
--
作者：
Inoue, A;Zhang, W;Kurosaka, K
采用铜模铸造法制备了Cu-Zr-Ti和Cu-Hf-Ti系新型铜基大块非晶合金。Cu 60 Zr 30 Ti 10和Cu 60 Hf 25 Ti 15合金的临界直径为4 mm，而Cu 60 Zr 40和Cu 60 Hf 40非晶合金的临界直径大于1 mm。Zr或Hf替代Ti导致玻璃形成能力（GFA）的增加。随着Ti含量的增加，Cu 60 Zr 40-xTix和Cu 60 Hf 40-xTix合金的玻璃化转变温度（T-g）、晶化温度（T-x）和过冷液相区Δ T（x）（= T-x-T-g）均降低。相比之下，对于Cu 60 Zr 20 Ti 20合金，液体温度（T-I）具有1127 K的最小值，对于Cu 60 Hf 20 T20合金，液体温度（T-I）具有1175 K的最小值，导致分别为0.63和0.62的最大T-g/T-I。对于这些Cu基合金，具有最高T-g/T-I值的合金显示出最高的GFA。大块非晶合金具有2000-2160 MPa的高拉伸断裂强度，2060-2150 MPa的压缩断裂强度和0.8- 1.7%的压缩塑性延伸率。具有高GFA、2000 MPa以上高断裂强度和明显塑性延伸率的新型铜基块体非晶合金的发现，对开发可用于结构材料的新型块体非晶合金具有鼓舞作用。由爱思唯尔科技有限公司出版。保留所有权利。
New Cu-based bulk glassy alloys were formed in Cu-Zr-Ti and Cu-Hf-Ti systems by the copper mold casting method. The critical diameter is 4 mm for the Cu60Zr30Ti10 and Cu60Hf25Ti15 alloys which are larger than 1 mm for the Cu60Zr40 and Cu60Hf40 glassy alloys. The substitution of Zr or Hf for Ti causes an increase in the glass-forming ability (GFA). As the Ti content increases, the glass transition temperature (T-g), crystallization temperature (T-x), and the supercooled liquid region DeltaT(x)( = T-x-T-g) decrease for both Cu60Zr40-xTix and Cu60Hf40-xTix alloys. In contrast, the liquid temperature (T-l) has a minimum value of 1127 K for the Cu60Zr20Ti20 alloy and 1175 K for the Cu60Hf20T20 alloy, resulting in a maximum T-g/T-l of 0.63 and 0.62, respectively. The alloys with the highest T-g/T-l value showed the highest GFA for these Cu-based alloys. The bulk glassy alloys exhibit high tensile fracture strength of 2000-2160 MPa, compressive fracture strength of 2060-2150 MPa and compressive plastic elongations of 0.8-1.7%. The finding of the new Cu-based bulk glassy alloys with high GFA, high fracture strength above 2000 MPa and distinct plastic elongation is encouraging for the future development of a new type of bulk glassy alloy which can be used for structural materials, (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.