10.14489/td.2016.07.pp.061-067

2016, 07 July

DOI: 10.14489/td.2016.07.pp.061-067

Lozhkova D.S., Krasnov I.S., Dalin М.А.
ESTIMATION OF DEFECT OF BBLANKS GTE WHEELS OF TITANIUM ALLOYS
(pp. 61-67)

Abstract. The questions of gas turbine engine titanium alloy bars and disks exceedence evaluation are observed in this paper. The “exceedence” concept is defined. It characterizes the probable defects of known or greater than known size content at known quantity of material after non-destructive evaluation. This work is devoted to titanium bars hard alpha inclusions because they are the most dangerous. Some approaches allowing to evaluate gas turbine engine titanium alloy bars and disks exceedence are observed. They differ from each other and depend on the defect detection statistic data availability. For each approaches the plotting algorithm of probability of exceedence versus anomaly area continuous curves at known quantity of material is described. Computing experiments confirming their working capacity are made. As result of saving experience and making experiments general methodology of gas turbine critical parts metallurgy defects content quantity evaluation is developed.

Keywords: exceedence, ultrasonic testing, gas turbine engine, titanium alloy, engine critical parts.

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D. S. Lozhkova, I. S. Krasnov, M. A. Dalin (All-Russian Scientific Research Institute of Aviation Materials, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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