Peculiarities of the Formation of Defects Initiating Fatigue Faults in Granular Alloy EP741NP

IF 0.6 4区 材料科学 Q4 CRYSTALLOGRAPHY
I. S. Pavlov, M. A. Artamonov, V. V. Artemov, A. S. Kumskov, E. Yu. Marchukov, A. L. Vasiliev
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引用次数: 0

Abstract

The EP741NP alloy samples destroyed during fatigue testing have been studied by transmission electron microscopy, energy-dispersive X-ray microanalysis, and electron diffraction. The composition and crystal structure of defects detected at the fatigue crack boundaries have been thoroughly examined. It has been shown that these defects have mainly the morphology of elongated flat “carpets” containing NiO, CTixNb\(_{{1 - x}}\), amorphous AlOx, HfO2, α-Al2O3, β-Al2O3, Al2MgO4, Co7Mo6, Co3O4, S4Ti3, NbO2, TiO2, and amorphous regions containing C, O, Ca, S, Na, and Cl. Assumptions concerning the source and time of formation of the investigated defects have been made.

Abstract Image

颗粒状合金EP741NP中引发疲劳故障缺陷形成的特点
采用透射电镜、能量色散x射线显微分析和电子衍射对疲劳试验中破坏的EP741NP合金试样进行了研究。研究了疲劳裂纹边界处缺陷的组成和晶体结构。结果表明,这些缺陷的形貌主要为含有NiO、CTixNb \(_{{1 - x}}\)、无定形alx、HfO2、α-Al2O3、β-Al2O3、Al2MgO4、Co7Mo6、Co3O4、S4Ti3、NbO2、TiO2的细长扁平“地毯”,以及含有C、O、Ca、S、Na和Cl的无定形区。对所研究缺陷的来源和形成时间作了假设。
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来源期刊
Crystallography Reports
Crystallography Reports 化学-晶体学
CiteScore
1.10
自引率
28.60%
发文量
96
审稿时长
4-8 weeks
期刊介绍: Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.
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