INVESTIGATION OF MATERIALS TO RESIST HOT CORROSION IN SMALL GAS TURBINE ENGINE RECUPERATORS
Quarterly rept. no. 3, 1 Dec 1967-29 Feb 1968
GARRETT CORP LOS ANGELES CA AIRESEARCH MFG DIV
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The program has the primary objective to conduct theoretical and experimental investigations of hot corrosion in Type 347 Stainless Steel and three other candidate materials. The initial tasks of the program were to select base metal materials for tubing and brazing alloys for joining. The selection to be based on a theoretical analysis and evaluation of the candidate materials ability to resist hot corrosion at 1500F. The preliminary brazing tests, now complete except for microprobe analysis, consisted of metallographical evaluation of the brazed joints and a 100 hour static hot corrosion test. Materials selected are as follows Tubing--Hastelloy X, Incoloy 800, Multimet N-155, 347 CRES Brazing alloy--Palniro 1 and J-8100, Palniro 7 and Coast Metals 50B, Palniro 1 and Nicrobraz 200, Palniro 7 and Nicrobraz 135. The cyclic-temperature hot corrosion tests, now in progress, are designed to develop stress rupture data from which two brazed base metal conbinations can be selected for further testing in Phase II of the program. The test procedure and equipment are described and the initial data points are tabulated.
- Properties of Metals and Alloys
- Jet and Gas Turbine Engines