Mohanavel V, Ravichandran M, Ashraff Ali K S, Sathish T, Karthick Alagar, Arungalai Vendan S, Velmurugan Palanivel, Salmen Saleh H, Alfarraj Saleh, Sivakumar S, Gebrekidan Atkilt Mulu
Centre for Materials Engineering and Regenerative Medicine, Bharath Institute of Higher Education and Research, Chennai, 600073 Tamil Nadu, India.
Department of Mechanical Engineering, Chandigarh University, Mohali 140413, Punjab, India.
Bioinorg Chem Appl. 2022 May 21;2022:8101680. doi: 10.1155/2022/8101680. eCollection 2022.
In this work, copper (Cu) matrix composite reinforced with titanium carbide (TiC) was fabricated by powder metallurgy (PM) method with the varying TiC content from 0% to 12% by weight in the step of 4%. The required weight percentage of powders was milled in an indigenously developed ball milling setup. Green compacts were made using a computer-controlled hydraulic press (400 kN) and sintered in a muffle furnace at a temperature of 950°C. Scanning electron microscope (SEM) was used to analyze the distribution of TiC particles in Cu matrix in as-sintered conditions. X-ray diffraction (XRD) analysis resulted in the existence of respective phases in the produced composites. The structural characteristics such as stress, strain, dislocation density, and grain size of the milled composites were evaluated. Cold upsetting was conducted for the sintered composites at room temperature to evaluate the axial ( ), hoop ( ), hydrostatic ( ), and effective ( ) true stresses. These stresses were analyzed against true axial strain ( ). Results showed that the increase in the inclusion of weight percentage of TiC into the Cu matrix increases density, hardness, ( ), ( ), ( ), ( ), and stress ratio parameters such as ( / ), ( / ), ( / ), and ( / ) of the composites.
在本研究中，采用粉末冶金（PM）法制备了碳化钛（TiC）增强铜（Cu）基复合材料，在该过程中，TiC的重量含量从0%变化到12%，步长为4%。所需粉末的重量百分比在自行研制的球磨装置中进行研磨。使用计算机控制的液压机（400 kN）制作生坯，并在马弗炉中于950°C的温度下进行烧结。利用扫描电子显微镜（SEM）分析烧结态下TiC颗粒在Cu基体中的分布情况。X射线衍射（XRD）分析表明所制备的复合材料中存在相应的相。对研磨后的复合材料的应力、应变、位错密度和晶粒尺寸等结构特征进行了评估。在室温下对烧结后的复合材料进行冷镦试验，以评估轴向（ ）、环向（ ）、静水（ ）和有效（ ）真应力。针对真轴向应变（ ）对这些应力进行了分析。结果表明，向Cu基体中增加TiC重量百分比的加入量会提高复合材料的密度、硬度、（ ）、（ ）、（ ）、（ ）以及诸如（ / ）、（ / ）、（ / ）和（ / ）等应力比参数。
