THE EFFECT OF ULTRA-FINE ALLOYING ELEMENTS ON THE PHASE COMPOSITION, MICROSTRUCTURE, HIGH-TEMPERATURE STRENGTH AND FRACTURE TOUGHNESS OF Ti–Si–X AND Ti–Cr–X COMPOSITES

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-03-15 DOI:10.36547/ams.28.1.1350

V. Kulyk, B. Vasyliv, Z. Duriagina, P. Lyutyy, V. Vavrukh, T. Kovbasiuk, V. Vira, M. Holovchuk, T. Loskutova

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Abstract

Advanced Ti-based composites are promising for applications in components of modern aircraft and rocket engines as well as other power equipment owing to their high strength-to-weight ratio and fracture toughness in a temperature range of 20 °C to 650 °C. However, there is a need to increase their operating temperature range up to 700−800 °C. In this work, mechanical behavior of Ti–Si–X composites (X=Al and/or Zr, Sn, C) has been studied. For comparison, mechanical behavior of Ti–Cr–X composite (X=Al and/or C) has been studied. As-cast and thermo-mechanically deformed series of beam specimens were examined. Strength tests of specimens were performed under three-point bending in a temperature range of 20 °C to 1000 °C. Single-edge notch beam (SENB) tests under three-point bending of specimen series were carried out in a temperature range of 20 °C to 900 °C for estimating fracture toughness of materials. Based on the constructed dependences of fracture toughness and strength on testing temperature for the specimen series as well as the microstructure and failure micromechanism analyses, the role of ultra-fine alloying elements in achieving good high-temperature strength and fracture toughness of the studied composites was substantiated.

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超细合金元素对Ti–Si–X和Ti–Cr–X复合材料相组成、微观结构、高温强度和断裂韧性的影响

先进的钛基复合材料在20°C至650°C的温度范围内具有较高的强度重量比和断裂韧性，有望应用于现代飞机、火箭发动机以及其他动力设备的部件。但是，需要将其工作温度范围提高到700−800°C。在这项工作中，研究了Ti–Si–X复合材料（X=Al和/或Zr，Sn，C）的力学行为。为了进行比较，研究了Ti–Cr–X复合材料（X=Al和/或C）的力学行为。对铸态和热机械变形的一系列梁试样进行了检验。试样的强度试验在20°C至1000°C的温度范围内进行三点弯曲。在20°C至900°C的温度范围内，对试样系列进行了三点弯曲下的单边缺口梁（SENB）试验，以评估材料的断裂韧性。基于试样系列断裂韧性和强度与试验温度的关系，以及微观结构和失效微观力学分析，证实了超细合金元素在实现所研究复合材料良好高温强度和断裂韧性方面的作用。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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