Development of cBN reinforced Ti6Al4V MMCs through laser sintering and process optimization

被引:29
作者
Hussain, M. [1 ]
Kumar, V. [1 ]
Mandal, V. [1 ]
Singh, P. K. [1 ]
Kumar, P. [1 ]
Das, A. K. [1 ]
机构
[1] Indian Inst Technol ISM Dhanbad, Dept Mech Engn, Dhanbad, Jharkhand, India
关键词
Microstructure; MMC; reinforcement; RSM; sintering; DIRECT METAL LASER; BIOMEDICAL APPLICATIONS; MATRIX COMPOSITES; WEAR-RESISTANCE; ALLOY; POWDER; BEHAVIOR; MICROSTRUCTURE; FABRICATION; DEPOSITION;
D O I
10.1080/10426914.2017.1303152
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, a systematic study and optimization on direct metal laser sintering (DMLS) of a cBN reinforced Ti6Al4V metal matrix composite (MMC) has been carried out using the response surface methodology (RSM). Variable process parameters such as volume % of cBN (5-15%), laser power (50-60W), scanning speed (3500-4500mm/min), and constant parameters such as laser spot diameter (0.2 mm), hatching gap (0.2 mm), and layer thickness (0.4) were considered for the experiments. The RSM was employed to establish a regression equation to predict different output parameters of the sintered samples such as the wear rate, relative density, and microhardness. Based on the developed model, the influence of process parameters on the wear rate, density, and microhardness were accomplished with optimized results. Hence, the result, thus, obtained showed the maximum hardness and density of 519 HV0.2 and 4.23g/cm(3), respectively, and the minimum wear of 26.49 mu m in a testing time duration of 10 minutes. X-Ray Diffraction (XRD) analysis of the fabricated MMC confirms the presence of different phases such as cBN, AlN, TiN, TiB2, and TiO2 as a consequence of a series of chemical reactions among cBN and different elements of Ti6Al4V in an argon atmosphere.
引用
收藏
页码:1667 / 1677
页数:11
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