{"title":"Effect of Annealing on the Microstructure and Hardness of EP648 Alloy after Direct Metal Deposition","authors":"E. A. Nosova, A. V. Balyakin, M. A. Oleynik","doi":"10.1134/S1063783423700075","DOIUrl":null,"url":null,"abstract":"<p>Samples of Ni-based super alloy are received by the method of direct metal deposition. Annealing at temperature 1180°С during 4 h is provided. Measurements of hardness, optical metallography, X-ray analysis are carried out. It was found that direct metal deposition of samples from Ni-based super alloy EP648 lead to Ni solid solution of alloying elements with face-centered cubic structure having lattice period <i>a</i> = 7.11 Å, also structure of Ni<sub>2</sub>Cr, is slightly revealed by optical metallography. Annealing at temperature 1180°С during 4 h of the direct metal deposited samples of super alloy EP648 lead to hardness increasing from от 19 ± 4 HRC to 34 ± 0.3 HRС, the uniformity of values are observed. After annealing the face-centered cubic structure is revealed, high value of lattice period is saving; presence of the phase Ni<sub>2</sub>Cr and sedimentation of Ni<sub>3</sub>Cr<sub>2</sub> are found. Residual tensile macro stresses are found.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 1","pages":"32 - 35"},"PeriodicalIF":0.9000,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of the Solid State","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063783423700075","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
Samples of Ni-based super alloy are received by the method of direct metal deposition. Annealing at temperature 1180°С during 4 h is provided. Measurements of hardness, optical metallography, X-ray analysis are carried out. It was found that direct metal deposition of samples from Ni-based super alloy EP648 lead to Ni solid solution of alloying elements with face-centered cubic structure having lattice period a = 7.11 Å, also structure of Ni2Cr, is slightly revealed by optical metallography. Annealing at temperature 1180°С during 4 h of the direct metal deposited samples of super alloy EP648 lead to hardness increasing from от 19 ± 4 HRC to 34 ± 0.3 HRС, the uniformity of values are observed. After annealing the face-centered cubic structure is revealed, high value of lattice period is saving; presence of the phase Ni2Cr and sedimentation of Ni3Cr2 are found. Residual tensile macro stresses are found.
期刊介绍：
Presents the latest results from Russia’s leading researchers in condensed matter physics at the Russian Academy of Sciences and other prestigious institutions. Covers all areas of solid state physics including solid state optics, solid state acoustics, electronic and vibrational spectra, phase transitions, ferroelectricity, magnetism, and superconductivity. Also presents review papers on the most important problems in solid state physics.
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