Serrated yielding in rapidly solidified Ni-20Al-12Cr-1.8Mo intermetallic alloy ribbons

摘要

PRELIMINARY OBSERVATIONS OF INSTABILITIES IN THE LUEDERS REGION OCCURRING DURING TENSILE STRAIN ARE REPORTED FOR A RAPIDLY SOLIDIFIED INTERMETALLIC NI-20AL-12CR-1.8MO ALLOY TESTED AT TEMPERATURES RANGING FROM 300-800 K. YIELDING WAS INDEPENDENT OF TEMPERATURES AND OCCURRED UNDER A LOAD OF APPROXIMATELY 16.5N AND STRAIN HARDENING WAS VERY LITTLE. SERRATED FLOW STARTED FROM THE ONSET OF YIELDING. TERMS: M--(U), SPAIN, ENGLISH, NI-20 AT. PCT AL-12 AT. PCT CR-2 AT. PCT MO, NI3AL, ALUMINUM ADDITION, CHROMIUM ADDITION, DEFORMATION, ELONGATION, FRACTURE SURFACE, GRAIN SIZE, MOLYBDENUM ADDITION, SEM, SERRATED FLOW, TENSILE YIELD STRENGTH, X- RAY DIFFRACTION, TEMP 0 TO 99 C, TEMP 100 TO 299 C, TEMP 300 TO 499 C, TEMP 500 TO 899 C, TENSILE TEST, CASTING, MELTING, RAPID SOLIDIFICATION, ALUMINIDES, INTERMETALLIC COMPOUNDS, MELT SPUN RIBBON, MICROSTRUCTURE, NICKEL ALLOYS.