Accession Number : AD0618121


Title :   TRANSFORMATIONS IN IRON-NICKEL ALLOYS,


Corporate Author : CITIES SERVICE ATHABASCA INC EDMONTON (ALBERTA)


Personal Author(s) : Swanson,W. D. ; Parr,J. Gordon


Report Date : 16 MAY 1963


Pagination or Media Count : 4


Abstract : Cooling curves of Fe-Ni alloys (1-10%Ni) quenched at rates up to 60 000 degC/s, reveal two transformation mechanisms: the lower-temperature mechanism is shown, by the criterion of shape change, to be martensitic. The measured M(s) temperatures do not agree with the experiments or calculations of previous investigators. In all but the 10% alloy, the higher-temperature transformation (believed to be the 'massive' transformation) occurs about 50 degC above M(s). The critical cooling rate to produce a martensitic product decreases from about 30 000 degC/s in the 1%Ni alloy to 15 000 degC/s in the 7% alloy. (Author)


Descriptors :   (*TRANSITION TEMPERATURE, MARTENSITE), (*IRON ALLOYS, NICKEL ALLOYS), (*TRANSFORMATIONS, IRON ALLOYS), PHASE STUDIES, METALLOGRAPHY, QUENCHING, SURFACE PROPERTIES


Distribution Statement : APPROVED FOR PUBLIC RELEASE