Computer Science
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974moon...11..313w&link_type=abstract
The Moon, vol. 11, Nov.-Dec. 1974, p. 313-316.
Computer Science
2
Iron Alloys, Lunar Composition, Nickel Alloys, Remanence, Body Centered Cubic Lattices, Geomagnetism, Lunar Rocks, Martensite, Mechanical Properties, Microstructure, Thermomagnetic Effects
Scientific paper
Lunar samples are magnetic primarily due to the body centered cubic (BCC) iron and iron-nickel alloys they contain. Presented for the first time are results which demonstrate that the magnitude of the martensitic thermal remanence (MTRM) induced on quenching iron-nickel alloy in the geomagnetic field depends on the nickel content of the alloy. High magnetic stability is due to the increasing dislocation density and increasingly complex microstructures associated with increasing nickel content in the alloys. The results agree with the mechanical and structural properties of the alloys. The characteristic quench martensite microstructure observed on metallographic examination provides a recognition criterion for the MTRM mechanism. These results are important for lunar and meteoritic research intending to ascertain the paleofield responsible for the observed remanent magnetization.-
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