摘要
通过添加不同质量分数(0.36%,0.72%,1.45%)的镧(La)和不同质量分数(0.17%,0.34%,0.68%)的硼(B)到Ti6Al4V基体合金,经过普通的真空自耗电弧熔炼和热锻技术成功制备了TiB+La2O3颗粒增强钛基复合材料,并对材料热处理后的显微组织和力学性能进行了分析。利用XRD对试样进行了物相分析,应用金相显微镜和扫描电镜对复合材料显微组织进行了观察,特别探讨了增强体的演变特征,测定了材料的室温力学性能和高温力学性能。结果表明,La、B的添加对复合材料的显微组织和力学性能的影响巨大,制备的复合材料表现出优异的力学性能,抗拉强度可提高148 MPa,能显著地强化基体合金。
The Ti6Al4V titanium matrix composites added with（0.36 wt%, 0.72 wt%, 1.45 wt%） La and（0.17 wt%, 0.34 wt%, 0.68 wt%） B, were synthesized using common casting and hot forging technology. The microstructural characteristics and tensile properties of the heat-treated materials were investigated, with particular emphasis on the effect of trace reinforcements. The phases were identified by XRD. Optical microscopy（OM） and scanning electron microscopy（SEM） were used to observe the microstructure. Both room temperature and high temperature tensile properties were tested. The results show that the addition of La and B plays an important role in the microstructure and mechanical properties of the titanium matrix composite. Tensile strength can be increased by 148 MPa, which can strengthen the matrix metal markedly.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第12期3104-3107,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51371114)
National Key Basic Research Development Foundation of China("973"Program)(2012CB619600)
China Postdoctoral Science Foundation(2014M550235)
Shanghai Postdoctoral Sustentation Fund(14R21410900)
Shanghai Academy of Spaceflight-Joint Research Centre of Shanghai Jiaotong University Advanced Aerospace Technology(US-CAST2012-14)
