Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7978395 | Materials Science and Engineering: A | 2015 | 5 Pages |
Abstract
The influence of niobium addition on the mechanical properties at high temperature of HP alloy has been investigated. Two HP alloys were centrifugally cast with a similar chemical composition differing only in the niobium content. Low strain rate high temperature tensile tests and creep-rupture tests were performed in the range of 900-1100 °C, and the results compared between the alloys. According to the results, the high temperature mechanical behavior of both alloys is controlled by several factors like solid solution, network of eutectic carbides, intradendritic precipitation and dendrite spacing. A significant increase in the mechanical properties for the HP alloy with niobium addition was found within the temperature range of 900-1050 °C. Beyond this temperature the mechanical behavior of both alloys is basically the same.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A.R. Andrade, C. Bolfarini, L.A.M. Ferreira, A.A.A. Vilar, C.D. Souza Filho, L.H.C. Bonazzi,