chapter  5
36 Pages

Near-Alpha Alloys

Ti-1.5Al-1.2Mn-0.15Si-0.3Zr, 650˚C/0.5h/AC, sheet specimen, tensile tested at room temperature. SEM fractograph shows overload fracture features with fine dimples.

FIGURE 5.5

Ti-6Al-5Zr-0.5Mo-0.25Si, 1050˚C/1h/OQ + 600˚C/24h/AC. Optical micrograph shows transformed

β

structure with prior

β

grain boundaries.