Studies on hardness, elastic modulus and high temperature oxidation resistance of TiC and TiB2 dispersed titanium aluminide (Ti45Al5Nb0.5Si) composites developed by laser direct energy deposition

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-11-05 DOI:10.1016/j.corsci.2024.112555

Anupama Dutta , Andreas Weisheit , Tapas Bera , Jyotsna Dutta Majumdar

引用次数: 0

Abstract

In this study, TiC (5–10 wt%) and TiB₂ (5–10 wt%) reinforced TiAl (Ti45Al5Nb0.5Si) composites have been developed by laser direct energy deposition (LDED) process. The microstructures of TiAl/TiC and TiAl/TiB₂ composites consist of TiC and TiB₂ particles dispersed in γ and α₂ matrix. The microhardness of the composites is improved from 571 HV to 634–683 HV (for TiC dispersion) and 649–694 HV (for TiB₂ dispersion). The activation energy of cyclic oxidation is increased from 228 kJ/mol (Ti45Al5Nb0.5Si) to 271–301 kJ/mol (TiC dispersion) and 262–296 kJ/mol (TiB₂ additions). The mechanism of oxidation of the composites is established.

查看原文本刊更多论文

激光直接能量沉积法制备的 TiC 和 TiB2 分散铝化钛（Ti45Al5Nb0.5Si）复合材料的硬度、弹性模量和高温抗氧化性研究

本研究采用激光直接能量沉积（LDED）工艺开发了 TiC（5-10 wt%）和 TiB2（5-10 wt%）增强 TiAl（Ti45Al5Nb0.5Si）复合材料。TiAl/TiC 和 TiAl/TiB2 复合材料的微观结构由分散在 γ 和 α2 基体中的 TiC 和 TiB2 颗粒组成。复合材料的显微硬度从 571 HV 提高到 634-683 HV（TiC 分散）和 649-694 HV（TiB2 分散）。循环氧化的活化能从 228 kJ/mol（Ti45Al5Nb0.5Si）增加到 271-301 kJ/mol（TiC 分散）和 262-296 kJ/mol（TiB2 添加）。确定了复合材料的氧化机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.