Aerospace Alloys by Stefano Gialanella & Alessio Malandruccolo

Author:Stefano Gialanella & Alessio Malandruccolo
Language: eng
Format: epub
ISBN: 9783030244408
Publisher: Springer International Publishing

DA718 is characterized by a production process that avoids solution treatment and uses a double aging treatment followed by water quenching. The double aging process implies a first treatment at 718 °C followed by a second at 621 °C. As-quenched material is characterized by retained strain that increases the γ″ and γ′ precipitation kinetics (Radavich 1989; Schafrik et al. 2001).

One of the many reasons for the success of Alloy 718 are its exceptional mechanical properties, whose evolution with temperature, as concerns UTS, yield strength, and elongation, is given in Fig. 6.15. Table 6.10 shows how this alloy is ranked with respect to other iron-based high-strength superalloys (ASM International 1993).

Fig. 6.15Evolution of tensile properties as a function of the temperature for a hot-rolled, annealed, and aged 13 mm round bar of Alloy 718. (Redrawn from ASM International 2000)

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.