over-ageingn.
/ˌəʊvərˈeɪdʒɪŋ/, U.S. /ˌoʊvərˈeɪdʒɪŋ/ Metallurgy.
Prolonged artificial ageing of metal so that its hardness begins to decrease.
ΘΚΠ
society > occupation and work > industry > working with specific materials > working with metal > [noun] > prolonged artificial ageing of metal
over-ageing1953
1953 Copper in Instrumentation (Copper Devel. Assoc.) i. 33 Since..the temperatures at which such protection becomes apparent are those at which over-ageing occurs, the use of beryllium copper merely as an oxidation-resisting material would hardly be economical.
1989 A. C. Davies Sci. & Pract. Welding (ed. 9) I. iii. 161 If the heating is too prolonged, visible crystals of θ separate out and the alloy resoftens. This is known as over-ageing.
1995 Proc. Royal Soc. A. 450 538 With final thinning by atom milling using a cryogenic stage to avoid overageing.
This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022).
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