直接轧制 TiCp/Ti-6Al-4V 复合材料以改善微观结构、机械性能和高温抗氧化性,Advanced Engineering Materials

当前位置： X-MOL 学术 › Adv. Eng. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

直接轧制 TiCp/Ti-6Al-4V 复合材料以改善微观结构、机械性能和高温抗氧化性
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-05-16 , DOI: 10.1002/adem.202100079
Y. Jia _{1,

2} , C.J. Zhang _{2,

3} , S.Z. Zhang _{2,

3} , H. Feng ₃ , F.Y. Han ₃ , J.C. Han _{1,

2} , Y. Cong ₄ , Y.Y. Chen ₄

Affiliation

在此，5 vol% TiC _p/Ti-6Al-4V 复合材料是通过感应头壳熔化 (ISM) 和近 β 相区直接轧制制备的。系统地研究了铸态和轧态复合材料的微观结构、力学性能和高温氧化行为。显微组织研究表明，直接轧制后，铸态粗大的 α/β 层状基体显微组织转变为细化的双峰显微组织。并且粗大且偏析的TiC颗粒趋于细化并均匀分布在基体中。拉伸试验结果表明，直接轧制后获得了匹配良好的强度和伸长率。室温 (RT) 和高温 (650 °C) 的拉伸强度分别增加到 1291.9 和 472.5 MPa，而轧制后的复合材料保持了 6.7% 和 26.8% 的良好延伸率，分别。强化机制可归因于晶界强化和 TiC 的承载能力。等温氧化试验表明，在 550 和 650 °C 下，轧制复合材料比铸态复合材料具有更好的抗氧化性。提高的抗氧化性主要是由于氧化物的显着细化并因此延缓了扩散过程。

"点击查看英文标题和摘要"

Direct Rolling of TiCp/Ti–6Al–4V Composite for Improved Microstructure, Mechanical Properties, and High-Temperature Oxidation Resistance

Herein, the 5 vol% TiC_p/Ti–6Al–4V composite is prepared by induction skull melting (ISM) and direct rolling in near-β phase region. The microstructure, mechanical properties, and high-temperature oxidation behavior of the as-cast and as-rolled composites are systematically investigated. The investigations of microstructure reveal that the as-cast coarse α/β lamellar matrix microstructure is translated to refined bimodal microstructure after direct rolling. And the coarse and segregated TiC particles tend to be refined and uniformly distributed in the matrix. Tensile test results exhibit that a well-matched strength and elongation is obtained after direct rolling. The tensile strength at room temperature (RT) and high temperature (650 °C) increases to 1291.9 and 472.5 MPa, respectively, while the as-rolled composite maintains a good elongation of 6.7% and 26.8%, respectively. The strengthening mechanism can be attributed to grain boundary strengthening and the load-bearing capability of TiC. Isothermal oxidation test indicates that as-rolled composite exhibits better oxidation resistance than as-cast composite both at 550 and 650 °C. The improved oxidation resistance is mainly a result of the significant refinement of oxides and consequently retarding the diffusion process.

更新日期：2021-05-16

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南