𝜶^″ Martensitic Twinning in Alpha + Beta Ti-3.5Al-4.5Mo Titanium Alloy

Figure 3

(a) The TEM bright field image of the sample quenched from 910°C, (b) the corresponding SAED pattern of the encircled area obtained from sample quenched from 910°C, the 𝛼^′′ martensite is in the class B transformation, namely, the {110}₀ compound twinning. (c) A representative TEM bright field micrograph structure in the sample quenched from 840°C and the SAED pattern from the circled region is shown in (d); and the 𝛼^′′ martensite is {111}₀ type I twinning, belonging to class A transformation.

(a)

(b)

(c)

(d)