Accession Number : ADA189106

Title :   Fatigue Corrosion of Amorphous Fe(75-x)Cr(x)B(15)Si(10) Wires.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD

Personal Author(s) : Kabacoff, Lawrence T ; Le, Anh

PDF Url : ADA189106

Report Date : Nov 1986

Pagination or Media Count : 20

Abstract : We have measured the fatigue and corrosion properties of metallic glass wires with the composition Fe(75-X)Cr(X)B(15)Si(10) (X = 5, 8, and 10). Measurements were made in air, water 3.5 w/o NaC1, and 1 N H2SO4. The observed fatigue limits are inversely proportional to the corrosion rate indicating a corrosion fatigue failure mechanism. Fatigue characteristics of the wires are vastly superior to melt spun metallic glass ribbons of similar composition, and superior to 304 stainless steel. Yield strengths up to 900 KSI have been observed (for 11 a/o Cr). Under certain circumstances, the wires are self healing in that if the cyclical strain applied to test specimens is interrupted prior to failure and then reapplied, the wire behaves in a manner identical to a new, unfatigued specimen. The corrosion characteristics of the wires are similar to those of melt spun ribbons of similar composition. Pitting and crevice corrosion in chloride environment are very slight or absent. Keywords: Amorphous alloys, Corrosion, Fatigue limit, Iron, Chromium, Boron, Silicon.

Descriptors :   *AMORPHOUS MATERIALS, *BORON, *CHROMIUM, *CORROSION, *FAILURE(MECHANICS), *FATIGUE(MECHANICS), *GLASS, *METALS, *SILICON, *WIRE, *IRON, ALLOYS, CHLORIDES, CRACKS, FATIGUE, HEALING, LIMITATIONS, MELTS, RATES, YIELD STRENGTH

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE