Microstructural characterization of Al-rich Ni-Cr-Al cast alloys

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Materials Characterization; (United States)

DOI:https://doi.org/10.1016/1044-5803(94)90076-0· OSTI ID:6989622

Gonzalez-Carrasco, J L; Adeva, P; Cristina, M C; Aballe, M ^[1]

---

1. Centro Nacional de Investigaciones Metalurgicas, Madrid (Spain)

Several Ni-Cr-Al alloys, with up to 30 at.% Al, were prepared in an induction furnace and cast under inert atmosphere. All alloys were homogenized for 8 h at 1,473 K under an argon atmosphere, followed by treatments at temperatures between 1,023 and 1,273 K for times up to 180 h. These alloys contain phases that are to a great extent, structurally similar. This is frequently complicated further by their particle size and their degree of order. Their characterization is not always simple and usually must be based on more than one technique. In this work the microstructural evolution was studied by means of light microscopy, scanning electron microscopy and microanalysis, and X-ray diffraction techniques. For completeness, hardness and microhardness tests were performed to evaluate the precipitation phenomenon.

• OSTI ID: 6989622
• Journal Information: Materials Characterization; (United States), Vol. 33:2; ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
MICROSTRUCTURE
PRECIPITATION HARDENING
CHROMIUM ALLOYS
NICKEL BASE ALLOYS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
ALLOYS
HARDENING
HEAT RESISTANT MATERIALS
MATERIALS
NICKEL ALLOYS
360102* - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties