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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, Barbara (Author), ID Tehovnik, Franc (Author), ID Vode, Franci (Author), ID Burja, Jaka (Author), ID Godec, Matjaž (Author)

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Abstract
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.

Language:English
Keywords:nickel-based superalloy, hot rolling, recrystallization, segregation, precipitation
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2019
Publication status in journal:Published
Article version:Publisher's version of article
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
UDC:669.245
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
Views:229
Downloads:65
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
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

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

Projects

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:P2-0132
Name:Fizika in kemija površin kovinskih materialov

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Funding programme:Young researcher

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