Nanoindentation Studies of the Effects of Ion Irradiation on the Near Surface Mechanical Response of Annealed Ti40Cu32Pd14Zr10Sn2Si2 Metallic Glass Ribbons
Nanoindentation Studies of the Effects of Ion Irradiation on the Near Surface Mechanical Response of Annealed Ti40Cu32Pd14Zr10Sn2Si2 Metallic Glass Ribbons
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DOI：
10.1115/1.4032820
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发表时间：
2016-10
影响因子：
2.5
通讯作者：
A. Zare;M. J. Klopfstein;D. Lucca;L. Price;L. Shao;G. Xie
中科院分区：
文献类型：
--
作者：
A. Zare;M. J. Klopfstein;D. Lucca;L. Price;L. Shao;G. Xie
采用布氏压痕仪和球形压痕仪对Ti 40 Cu 32 Pd 14 Zr 10 Sn 2 Si 2金属玻璃（MG）薄带进行了纳米压痕实验，研究了低于玻璃转变温度的退火和室温离子辐照对MG薄带近表面力学响应的影响。在573 K和673 K下真空等温退火4小时。退火被认为是增加试样的硬度和降低其延展性。随后在室温下用3.5MeV的Cu ~（2+）离子以1 × 1012 ions/cm ~ 2或1 × 1016 ions/cm ~ 2的注量辐照退火后的样品。纳米压痕实验表明，在1 × 1012 ions/cm ~ 2的能量密度下，退火和辐照试样的硬度降低，塑性增加。虽然在球形压头下的平均接触压力和临界剪切应力值表明辐照后更容易形成剪切带，但将辐照能量密度增加到1 × 1016 ions/cm 2时，试样的硬度值增加，塑性降低。
Nanoindentation experiments with a Berkovich indenter and a spherical indenter were performed to study the effects of annealing at temperatures below the glass transition temperature and room temperature ion irradiation on the near surface mechanical response of Ti40Cu32Pd14Zr10Sn2Si2metallic glass (MG) ribbons. The specimens were isothermally annealed in vacuum at 573 K and 673 K for 4 hrs. Annealing was seen to increase the hardness of the specimens and decrease their ductility. The annealed specimens were subsequently irradiated by 3.5 MeV Cu2+ions at room temperature using a fluence of 1 × 1012ions/cm2or 1 × 1016ions/cm2. Nanoindentation experiments on the annealed and irradiated specimens showed a reduction in hardness and an increase in ductility for the specimens irradiated at a fluence of 1 × 1012ions/cm2. Although the values of the mean contact pressure and critical shear stress under the spherical indenter showed an easier formation of shear bands after irradiation, increasing the irradiation fluence to 1 × 1016ions/cm2was seen to increase the hardness value and decrease the ductility of the specimens.