Turbomachine vane provided with a structure reducing the risk of cracks

A vane 54, suitable for a turbomachine, comprising an aerodynamic profile 61, having a leading edge and formed from a body 70 and an add-on part 74. The add-on part is inserted in a recess in a median part of an end part 73 of the body, said end part forming the bodys leading edge 62. The insert is fixed to the body by brazing, and thereby plugs the recess and forms a middle portion of the leading edge. The body is made of a first material with a first coefficient of linear thermal expansion and the add-on is made from a second material with a second coefficient of linear thermal expansion, which is larger than the first coefficient at a normal operating temperature of the vane. Preferably the add-on part helps to delimit an internal cavity (75, fig 5) inside the aerodynamic profile of the vane. Preferably the add-on part comprises at least one flow distributor on its internal surface which delimits the cavity.