简介：TheX-raydiffractionpeak-shiftmethodwasintroducedintothedeterminationofdeformationfaultprobability(α)ofFe-Mn-SialloyswithvariousMncontentsandthermomechanicalcyclingnumbers.Thepreciselatticeconstantsrequiredwereobtainedbynumericalcalculationinsteadofusingstandardsamplewithoutanyfault.Theinfluenceofinternalstressonthedeterminedαhasbeenevaluated,andthecausedrelativeerrorwasdeterminedasabout4%andthusnegligible.TheresultsshowthatthedeformationfaultprobabilityincreaseswithdecreasingMn-contentandincreasingcyclenumber,whicharequalitativelyconsistentwiththoseresultsofPsfdeterminedbypeak-broadeningmethod.
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