The present work concerns understanding the microstructure and nano-mechanical properties of titanium carbide (TiC) added (5 wt% and 10 wt%) titanium aluminide (Ti45Al5Nb0.5Si) composite developed by laser additive manufacturing (LAM) route. LAM has been carried out by melting pre-mixed titanium aluminide (Ti45Al5Nb0.5Si) and titanium carbide (5 wt% and 10 wt%) with a Nd:YAG laser (of 3 kW power and 2 mm beam diameter) and subsequently, depositing it on Ti–6Al–4V substrate one layer after another to a dimension of 10 mm × 10 mm x 4 mm. The process parameters used in the present study were applied power (varying from 400 to 600 W), scan speed between 200 and 400 mm/min and powder feed rate varying from 1.8 to 2.6 g/min. The effect of process parameters on microstructure, phase fraction, residual stress and microhardness was determined. In the LAM clad coupon there is formation of refined microstructures with the dispersion of carbides (TiC, Ti₂AlC, Ti₃AlC₂ and Ti₂AlC) in refined α₂+γ matrix. TiC addition increases the nanohardness, which varies with applied laser parameters. Attempts were made to derive the process parameters corresponding to a maximum improvement in nano-hardness.

目前的工作涉及对通过激光增材制造（LAM）路线开发的碳化钛（TiC）添加（分别为5 wt％和10 wt％）铝化钛（Ti45Al5Nb0.5Si）复合材料的微观结构和纳米机械性能的了解。通过使用Nd：YAG激光（功率为3 kW，光束直径为2 mm）熔化预混合的铝化钛（Ti45Al5Nb0.5Si）和碳化钛（5 wt％和10 wt％）来进行LAM。它在Ti-6Al-4V衬底上一层又一层地形成10mm×10mm x 4mm的尺寸。本研究中使用的工艺参数为施加功率（400至600 W），扫描速度为200至400 mm / min，粉末进料速度为1.8至2.6 g / min。确定了工艺参数对组织，相分数，残余应力和显微硬度的影响。₂ ALC，钛₃ ALC ₂和Ti ₂ ALC）在精制α ₂ +γ基质。添加TiC会增加纳米硬度，纳米硬度会随所施加的激光参数而变化。试图得出与纳米硬度的最大提高相对应的工艺参数。