Effect of Annealing on the Microstructure and Hardness of EP648 Alloy after Direct Metal Deposition

IF 0.9 4区 物理与天体物理 Q4 PHYSICS, CONDENSED MATTER Physics of the Solid State Pub Date : 2023-12-08 DOI:10.1134/S1063783423700075
E. A. Nosova, A. V. Balyakin, M. A. Oleynik
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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.

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退火对直接金属沉积后 EP648 合金微观结构和硬度的影响
摘要 通过直接金属沉积法获得了镍基超级合金样品。在 1180°С 温度下退火 4 小时。进行了硬度测量、光学金相分析和 X 射线分析。研究发现,镍基超级合金 EP648 样品的直接金属沉积导致合金元素的镍固溶体具有面心立方结构,晶格周期 a = 7.11 Å,光学金相分析也略微显示出 Ni2Cr 的结构。超级合金 EP648 的直接金属沉积样品在 1180°С 温度下退火 4 小时后,硬度从 от 19 ± 4 HRC 提高到 34 ± 0.3 HRС,且硬度值均匀一致。退火后,面心立方结构显现出来,晶格周期值变高;发现了 Ni2Cr 相的存在和 Ni3Cr2 的沉积。发现了残余拉伸宏观应力。
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来源期刊
Physics of the Solid State
Physics of the Solid State 物理-物理:凝聚态物理
CiteScore
1.70
自引率
0.00%
发文量
60
审稿时长
2-4 weeks
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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