Texture evolution of Al-Mg-Li aeronautical alloys in in-situ tension

Zhong-wei Chen, Jing Zhao, and Shi-shun Li State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China

摘 要：Texture evolution in extruded and hot-rolled Al-Mg-Li aeronautical alloys during in-situ tension was investigated by using elec-tron backscattered diffraction （EBSD）. A field emission scanning electron microscope （FE-SEM） and a MICROTEST-5000 tensile stage were used to carry out in-situ tension tests and observations. The crystallographic texture of the extruded sample changed from weak cube texture {001}<100> to texture {018}<081> during tension fracture. However, strong Brass {110}<112> in the hot-rolled sample was modi-fied into a mixture texture component of Brass {110}<112> and S {123}<634> during tension fracture. Texture evolution in the two samples during tension can be explained by the rotation of grain orientation.

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