Study of the character and causes of destruction of the cardan shaft of the propeller engine

Author:

Movenko D. A.1,Morozova L. V.1,Shurtakov S. V.1

Affiliation:

1. Federal State Unitary Enterprise «All-Russian Scientific Research Institute of Aviation Materials»

Abstract

The results of studying operational destruction of a high-loaded cardan shaft of the propeller engine made of steel 38KhN3MFA are presented to elucidate the cause of damage and develop a set of recommendations and measures aimed at elimination of adverse factors. Methods of scanning electron and optical microscopy, as well as X-ray spectral microanalysis are used to determine the mechanical properties, chemical composition, microstructure, and fracture pattern of cardan shaft fragments. It is shown that the mechanical properties and chemical composition of the material correspond to the requirements of the regulatory documentation, defects of metallurgical origin both in the shaft metal and in the fractures are absent. The microstructure of the studied shaft fragments is tempered martensite. Fractographic analysis revealed that the destruction of cardan shaft occurred by a static mechanism. The fracture surface is coated with corrosion products. The revealed cracks developed by the mechanism of corrosion cracking due to violation of the protective coating on the shaft. The results of the study showed that the destruction of the cardan shaft of a propeller engine made of steel 38Kh3MFA occurred due to formation and development of spiral cracks by the mechanism of stress corrosion cracking under loads below the yield point of steel. The reason for «neck» formation upon destruction of the shaft fragment is attributed to the yield point of steel attained during operation. Regular preventive inspections are recommended to assess the safety of the protective coating on the shaft surface to exclude formation and development of corrosion cracks.

Publisher

TEST-ZL Publishing

Subject

Condensed Matter Physics

Reference15 articles.

1. Steklov O. I. Firmness of materials and designs with corrosion energized. — Moscow: Mashinostroenie. 1990. — 384 p. [in Russian].

2. Mironov A. V., Lisin I. V. Stress corrosion cracking / Tekhnol. Metal. 2007. N 6. P. 53 – 54 [in Russian].

3. Belous V. Ya., Varlamova V. E., Zhilikov V. P. Resistance to corrosion cracking of martensitic staly ЙI692-Sh and ЙP609-Sh in different weather conditions / Korroz. Mater. Zashch. 2014. N 7. P. 13 – 19 [in Russian].

4. Belous V. Ya., Gurvich L. Y., Zhirnov A. D., Kafelnikov V. V., Laschevskiy V. B., Rechmenskaya A. G., Usankova L. A., Shubadeeva L. I. Corrosion cracking of high-strength stainless steels and its diagnosing / Zashch. Metal. 1997. Vol. 33. N 1. P. 43 – 51 [in Russian].

5. Gnevko A., Lazarev D., Sidorov I., Solovov S. Way of express assessment of tendency to delayed fracture and corrosion cracking of metal constructional materials / TehNadzor. 2016. N 2(111). P. 104 – 105 [in Russian].

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3