Effect of the cooling rate on microstructure and hardness of MAR-M247 Ni-based superalloy

Milenkovic, Srdjan and Sabirov, Ilchat and Llorca Martinez, Francisco Javier (2012). Effect of the cooling rate on microstructure and hardness of MAR-M247 Ni-based superalloy. "Materials Letters", v. 73 ; pp. 216-219. ISSN 0167-577X. https://doi.org/10.1016/j.matlet.2012.01.028.

Description

Title: Effect of the cooling rate on microstructure and hardness of MAR-M247 Ni-based superalloy
Author/s:
  • Milenkovic, Srdjan
  • Sabirov, Ilchat
  • Llorca Martinez, Francisco Javier
Item Type: Article
Título de Revista/Publicación: Materials Letters
Date: 15 April 2012
ISSN: 0167-577X
Volume: 73
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The effect of cooling rate on the microstructure of MAR-M247 Ni-based superalloy was investigated via physical simulation of the casting process. Solidification experiments with cooling rates in the range of 0.25–10 K/s showed smooth temperature profiles with measured cooling rates matching the set values. The MAR-M247 showed cellular (0.25 K/s) and dendritic (1, 5 and 10 K/s) microstructures. Microconstituents also varied with cooling rates: γ/γ′ matrix with carbides and γ/γ′ eutectic at 0.25 K/s, γ/γ′ matrix with carbides at 1 K/s, and γ/γ′ matrix with carbides and γ/MC eutectic at 5 and 10 K/s. Moreover, the secondary dendritic arm spacing decreased and the hardness increased with the increase in the cooling rates.

More information

Item ID: 15680
DC Identifier: http://oa.upm.es/15680/
OAI Identifier: oai:oa.upm.es:15680
DOI: 10.1016/j.matlet.2012.01.028
Official URL: http://www.sciencedirect.com/science/article/pii/S0167577X12000493
Deposited by: Memoria Investigacion
Deposited on: 18 Nov 2013 09:37
Last Modified: 21 Apr 2016 15:56
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