Y添加Ti40Zr25Cu9Ni8Be18非晶合金的纳米晶化及力学性能

doi:10.11868/j.issn.1001-4381.2017.001622

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摘要

利用铜模铸造法制备直径为3mm的（Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈）_100-xY_x（x=0，1.0，1.5，2.0，3.0）合金棒材，采用X射线衍射仪（XRD）、扫描电镜（SEM）、透射电镜（TEM）、差式扫描量热计（DSC）和单轴压缩测试设备对合金的组织、玻璃形成能力和力学性能进行研究。结果表明：Y元素含量为1.0%（原子分数，下同）时，合金的衍射结果为非晶态；Y元素含量为1.5%时，诱发了非晶合金的纳米晶化。在高分辨透射电镜下可观察到，非晶基体上析出5~20nm左右的晶化相，含Y为1.5%的合金抗压强度高达1990MPa，塑性应变高达3.0%；Y添加后合金断口处剪切带数量增加。多剪切带之间的交错，阻碍不均匀形变，提高了合金的塑性和强度。

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	山圣峰
	田晓生
	于涛
	贾元智
	马明臻

关键词 ： Ti基非晶合金, Y添加, 力学性能, 纳米晶化

Abstract：

(Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_100-xY_x (x=0, 1.0, 1.5, 2.0, 3.0) alloy rods with 3mm in diameter were fabricated by copper mold casting method. The microstructures, nano-crystallization and mechanical properties of the alloys were investigated by X-ray diffractometry(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), differential scanning colorimetry(DSC) and uniaxial compressive test.The results show that with 1.0%(atom fraction, the same below) addition of Y, the alloy presents amorphous nature by X-ray examination, with 1.5% of Y addition, nano-crystallization of the amorphous alloy is induced. Crystalline phases with the size of 5-20nm can be observed distributed in the amorphous matrix by high resolution transmission electron microscopy. The alloy with 1.5% of Y addition presents the fracture strength of 1990MPa, at the plastic strain of 3% upon uniaxial compressive test. The number of shear bands is increased in the fracture surfaces of the alloys with Y addition. The interference of shear bands hinders inhomogeneous deformation, increases the fracture strength and plasticity of the alloy.

Key words： Ti-based amorphous alloy Y addition mechanical property nano-crystallization

收稿日期: 2017-12-20 出版日期: 2018-07-20

中图分类号:

TG139⁺.8

基金资助:国家自然科学基金(51471143);国家自然科学基金(51671166);国家自然科学基金(51434008);河北省教育厅青年基金(QN2014156)

通讯作者: 山圣峰 E-mail: sdjnssf@163.com

作者简介: 山圣峰(1969-), 男, 副教授, 博士, 研究方向:钛基非晶合金的制备及性能, 联系地址:山东曲阜市杏坛路1号济宁学院物理与信息工程系(273155), E-mail:sdjnssf@163.com

引用本文:

山圣峰, 田晓生, 于涛, 贾元智, 马明臻. Y添加Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈非晶合金的纳米晶化及力学性能[J]. 材料工程, 2018, 46(7): 88-93.
Sheng-feng SHAN, Xiao-sheng TIAN, Tao YU, Yuan-zhi JIA, Ming-zhen MA. Nano-crystallization and Mechanical Properties of Y Addition Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈ Amorphous Alloy. Journal of Materials Engineering, 2018, 46(7): 88-93.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.001622 或 http://jme.biam.ac.cn/CN/Y2018/V46/I7/88

Fig.1 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_100-xY_x(x=0，1.0，1.5，2.0，3.0)合金的XRD图谱

Fig.2 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_100-xY_x(x=0，1.0，1.5，2.0，3.0)合金的DSC曲线

Table 1 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_100-xY_x(x=0，1.0，1.5，2.0，3.0)非晶合金的热性能

Fig.3 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₁₀₀Y₀(a), (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₉Y₁(b), (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_98.5Y_1.5(c), (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₈Y_2.0(d)和(Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₇Y_3.0(e)非晶合金的压缩应力-应变曲线

Table 2 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_100-xY_x(x=0, 1.0, 1.5, 2.0, 3.0)非晶合金的压缩力学性能参数

Fig.4 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₉Y₁(a)及(Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_98.5Y_1.5合金(b)的HRTEM照片及衍射花样

Fig.5 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₉Y₁(a)，(Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)_98.5Y_1.5(b)及(Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₈Y₂(c)非晶合金断口SEM照片

Fig.6 (Ti₄₀Zr₂₅Cu₉Ni₈Be₁₈)₉₈Y₂的TEM照片

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