Fig. 1: Mechanical properties of Ti-Al-O ternary alloys at liquid nitrogen temperature.
From: Elimination of oxygen sensitivity in α-titanium by substitutional alloying with Al

a Engineering stress–strain curves of Ti-O and Ti-Al-O alloys tested in liquid nitrogen at a strain rate of 10−3 s−1 (all compositions in wt.%). b 3D-plot showing the combined effects of aluminum and oxygen contents on the tensile toughness (the area covered beneath the engineering stress–strain curves) of Ti-O and Ti-Al-O alloys in liquid nitrogen. True stress–strain curves (solid lines) and strain-hardening rate curves (symbols) of Ti-xAl-0.1 O c and Ti-xAl-0.3 O d alloy systems (x = 0, 2, 4, and 6) in liquid nitrogen. The strain-hardening rates and tensile ductilities of the two alloy systems trend in opposite directions with increasing aluminum content.