Quantification of the alpha-to-beta brass ratio in wire coatings

In the radial tire industry, stainless steel wires are used extensively. These wires are coated with brass (Cu, Zn alloys) and can contain two separate phases of brass, alpha and beta. Ideally, these wire coatings should be completely or predominantly alpha-phase brass. If the beta phase concentration becomes too large, it affects the wire strength while pulling through the dyes and causes the wire to snap. The beta phase also decreases the adherence of the wires to rubber, resulting in a weakening in the overall tire strength. Quantification of the alpha to beta brass ratios can easily be accomplished with the MiniFlex diffractometer as part of an on-line quality control program.

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Figure 1: The various gauges of brass coated steel wire for diffraction analysis

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Figure 2: Diffraction pattern of a 1.58 gauge wire. Red lines correspond to the alpha brass phase. Blue lines correspond to the beta brass phase.

MiniFlexNew sixth generation MiniFlex X-ray diffractometer (XRD) is a multipurpose analytical instrument that can determine: phase identification and quantification, percent (%) crystallinity, crystallite size and strain, lattice parameter refinement, Rietveld refinement, and molecular structure. It is widely used in research, especially in material science and chemistry, as well as in industry for research and quality control. It is the newest addition to MiniFlex series of benchtop X-ray diffraction analyzers from Rigaku, which began with the introduction of the original MiniFlex system decades ago. Read more about Rigaku's MiniFlex...

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