Mechanical properties of Inconel 718 and Nickel 201 alloys after thermal histories simulating brazing and high temperature service
An experimental investigation was made to evaluate two nickel base alloys (Nickel-201 and Inconel-718) in three heat treated conditions. These conditions were: (1) annealed; (2) after thermal exposure simulating a braze cycle; and (3) after a thermal exposure simulating a braze cycle plus one operational lifetime of high temperature service. For the Nickel-201, two different braze cycle temperatures were evaluated. A braze cycle utilizing a lower braze temperature resulted in less grain growth for Nickel-201 than the standard braze cycle used for joining Nickel-201 to Inconel-718. It was determined, however, that Nickel-201, was marginal for temperatures investigated due to large grain growth. After the thermal exposures described above, the mechanical properties of Nickel-201 were degraded, whereas similar exposure on Inconel-718 actually strengthened the material compared with the annealed condition. The investigation included tensile tests at both room temperature and elevated temperatures, stress-rupture tests, and metallographic examination.
- Research Organization:
- Kentron International, Inc., Hampton, VA (USA). Aerospace Technologies Div.
- OSTI ID:
- 6244451
- Report Number(s):
- N-86-11312
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ANNEALING
BRAZING
CHROMIUM ALLOYS
DATA
EXPERIMENTAL DATA
FABRICATION
GRAIN GROWTH
HEAT TREATMENTS
INCONEL 718
INCONEL ALLOYS
INFORMATION
JOINING
MECHANICAL PROPERTIES
METALLOGRAPHY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
WELDING
YIELD STRENGTH