Data for: Nanoindentation studies of the mechanical behaviours of spark plasma sintered multiwall carbon nanotubes reinforced Ti6Al4V nanocomposites

In this study, the influence of multiwall carbon nanotubes (MWCNT) additions on the mechanical properties of sintered Ti6Al4V-based nanocomposites was investigated. The nanocomposites were fabricated with varying weight fractions of MWCNT (0.5, 1.0 & 1.5 wt.%) using the spark plasma sintering (SPS) technique. Investigations were carried out using nanoindentation of varying indentation loads (50 mN, 75 mN and 100 mN) to assess the nanohardness (H) and reduced elastic modulus (Er) of the alloy and nanocomposites. Further analysis was done to evaluate the elastic recovery index (W_e⁄W_t ), plasticity index (W_p⁄W_t ), elastic strain resistance (H⁄E_r ) and yield pressure (H^3⁄(E_r^2 )) at the maximum load. Microstructural analysis revealed the presence of the MWCNT dispersed across the alpha and beta phases of the Ti6Al4V matrix. The nanoindentation studies showed that the nanohardness, elastic modulus, elastic recovery index, elastic strain resistance and anti-wear properties improved with the MWCNT addition and continually increased with increase in nanotubes content. Also, it was observed that the nanohardness and reduced elastic modulus of the fabricated nanocomposites are in the range of 4677-9276 MPa and 29.3-60.9 GPa respectively which declined with increase in indentation load. The sintered Ti6Al4V displayed the least resistance to plastic deformation.

在本项研究中，探讨了多壁碳纳米管（MWCNT）添加对烧结Ti6Al4V基纳米复合材料的力学性能的影响。通过火花等离子烧结（SPS）技术，以不同的MWCNT重量百分比（0.5、1.0及1.5 wt.%）制备了纳米复合材料。利用不同压入载荷（50 mN、75 mN和100 mN）的纳米压痕试验，对合金和纳米复合材料的纳米硬度（H）和降低的弹性模量（Er）进行了评估。进一步的分析旨在评估最大载荷下的弹性恢复指数（W_e/W_t）、塑性指数（W_p/W_t）、弹性应变阻力（H/E_r）及屈服压力（H^3/(E_r^2)）。微观结构分析揭示了MWCNT在Ti6Al4V基体的α和β相中均匀分散。纳米压痕研究表明，纳米硬度、弹性模量、弹性恢复指数、弹性应变阻力和抗磨损性能随着MWCNT的添加而提高，且随着纳米管含量的增加而持续增强。此外，观察到的纳米复合材料的纳米硬度及降低的弹性模量分别位于4677-9276 MPa和29.3-60.9 GPa之间，且随压入载荷的增加而降低。烧结的Ti6Al4V表现出对塑性变形的最小抵抗。