properties are given in Table 2. Three-point sigle-edge noched bend (SENB) specimens were used for J-integral tests. The size is shown in Figure1. Based metal, welded joint and HAZ material were used to make different test specimens. Specimens made from the Ti-alloy plate were cut along L-T and L-S direction (see Figure 2). and those made from the Ti-alloy rolled ring were obtained along C-R, R-L and L-R dirrection respectively. (see Figure 3). Figure 3: Crack plane orientation for a rolled bar Figure 1: SENB specimen Figure 2: Specimen orientation for a plate C-R C-L L-R R-L
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