Szczegóły publikacji
Opis bibliograficzny
Optimization of mechanical properties of a $Ni-Mo-Cr$ alloy by structural modifications induced by changes in heat treatment / Stanisław DYMEK, Marek Dollar, Moen Farooqi // Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing ; ISSN 0921-5093. — 2001 — vols. 319–321, s. 284–289. — Bibliogr. s. 289, Abstr. — ICSMA-12 : 12th International Conference on the Strength of Materials : 27 August–1 September, 2000 Asilomar, CA, USA / eds. M. J. Mills [et al.]. — Amsterdam [etc.] : Elsevier, 2001
Autorzy (3)
- AGHDymek Stanisław
- Dollar Marek
- Farooqi Moen
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 9250 |
|---|---|
| Data dodania do BaDAP | 2002-05-22 |
| DOI | 10.1016/S0921-5093(01)01104-2 |
| Rok publikacji | 2001 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Materials Science and Engineering, A, Structural Materials: Properties, Microstructure and Processing |
Abstract
The influence of modifications of heat treatment applied to a commercial Ni-25 wt.%Mo-8 wt.%Cr age-hardenable alloy (HAYNES(R) 242(TM)) on microstructure and mechanical properties were investigated. The standard heat treatment (aging at 650degreesC for 72 h), producing coherent long-range ordered domains with the Ni-2(Mo, Cr) stoichiometry, was modified by short duration thermal exposures at temperatures at between 760 and 980degreesC (preceding the alloy's aging). The intermediate heat treatment (IHT) affected the size of the long-range order domains and produced precipitations of a mu phase on the grain boundaries. The size of the ordered domains depended on the temperature of the IHT. The largest domains occurred after the IHT at 760degreesC. With the increase in the IHT temperature, the domain size decreased. The yield strength of the alloy increased with increasing domain size. The amount of grain boundary particles. and not the size of the ordered domains, controlled the ductility of the material subjected to the IHT: The more grain boundary precipitates there were, the lower tensile ductility. Optimization of the tensile properties (strength and ductility) of the examined alloy occurred when the conventional aging was preceded by the IHT at 760degreesC. (C) 2001 Published by Elsevier Science B.V.
