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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
The Effect Of Inoculant On The Grain Structure Of A Nickel Base Superalloy IN738LC
Yaser Tashakori1; Mohammad Naseri1;1MAVADKARAN-MAPNA, Karaj, Iran;
Type of Paper: Regular
Id Paper: 482
Topic: 9
Abstract:
The control of grain structure is an important task in the manufacture of gas turbines blades. This research focuses on the effects of inoculant on the grain structure, microporosity and secondary denderite arm spacing (SDAS) in these blades. Sample blades were prepared by vacuum investment casting of superalloy IN738LC, which is used in the first and second stage of most gas turbines. Inoculation was achieved by applying 0-10% wt cobalt aluminate particles onto the mould as a coating. Using inoculant up to 6% resulted a significant reduction in grain size and increasing the amount of that seems to have no considerable effect on the structure.