The influence of segregation bands and hot rolling on the precipitation of secondary phases during aging at 750 °C for nickel alloy 625
ID Malej, Simon (Author), ID Medved, Jože (Author), ID Šetina Batič, Barbara (Author), ID Tehovnik, Franc (Author), ID Vode, Franci (Author), ID Burja, Jaka (Author), ID Godec, Matjaž (Author)

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For Inconel 625, where the γ” and δ phases precipitate, the influence of prior hot rolling on the process is not well covered. The influence of segregation bands and prior hot rolling on the precipitation of secondary phases during aging at 750 °C for different times was investigated. Prior hot-rolling was conducted on a hot rolling mill at 1050 °C and 1150 °C with three different deformation levels. The hot rolled samples were aged at 750 °C for 1, 5, 25 and 125 h. The γ” precipitated in both the deformed and recrystallized grains in the segregation bands containing a high concentration of niobium and molybdenum and a lower concentration of nickel, chromium and iron. The opposite was observed between the segregation bands where no γ” precipitate was found. There was a smooth transition in the density and the size of the γ” particles in the deformed grains at the border of the segregation bands, while a more complex transition occurred in the recrystallized grains. This occurred in the area where the average niobium concentration decreased from 4.5 to 2.7 wt. %, which influenced the mechanical properties.

Keywords:nickel-based superalloy, hot rolling, recrystallization, segregation, precipitation
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:NTF - Faculty of Natural Sciences and Engineering
Publication status:Published
Publication version:Version of Record
Number of pages:20 str.
Numbering:Vol. 9, iss. 3, art. 314
PID:20.500.12556/RUL-131934 This link opens in a new window
ISSN on article:2075-4701
DOI:10.3390/met9030314 This link opens in a new window
COBISS.SI-ID:1467818 This link opens in a new window
Publication date in RUL:06.10.2021
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Shortened title:Metals
Publisher:MDPI AG
COBISS.SI-ID:15976214 This link opens in a new window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:11.03.2019

Secondary language

Keywords:nikljeve superzlitine, vroče valjanje, rekristalizacija, segregacija, izločanje


Funder:ARRS - Slovenian Research Agency
Project number:P2-0132
Name:Fizika in kemija površin kovinskih materialov

Funder:ARRS - Slovenian Research Agency
Funding programme:Young researcher

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