Effect of room temperature and liquid nitrogen temperature control on mechanical properties and texture of rolled Al-Sc alloy

doi:10.13251/j.issn.0254-6051.2020.02.004

Abstract

Abstract:

Effects of 80% rolling deformation at room temperature and liquid nitrogen temperature controlled on microstructure and properties of Al-Sc alloy were investigated by means of microhardness, tensile test, metallographic structure, scanning electron microscopy(SEM) and backscattered electron diffraction analysis(EBSD), respectively. The results show that the hardness of the alloy after room temperature rolling and liquid nitrogen temperature controlled rolling is 105 HV0.3 and 162 HV0.3 respectively, and the tensile strength, yield strength and elongation are 335 MPa, 296 MPa, 5.5% and 443 MPa, 415 MPa and 6.7%, respectively. After rolling, the grain boundary of the alloy is mainly comprised of small-angle grain boundaries and the average grain sizes after room temperature rolling and liquid nitrogen temperature controlled rolling are approximately 40 μm and 1 μm, respectively. Due to the influence of stacking fault energy, the main texture types of the Al-Sc alloy after liquid nitrogen temperature controlled rolling are Brass texture {110}<112> and S texture {123}<634>, as well as the Copper texture {112}<111>.

Key words: Al-Sc alloy, liquid nitrogen temperature controlled rolling, room temperature rolling, texture

CLC Number:

TG339

Luo Zhiyong, Li Heng, Wang Zhen, Li Ming. Effect of room temperature and liquid nitrogen temperature control on mechanical properties and texture of rolled Al-Sc alloy[J]. HTM, 2020, 45(2): 19-22.

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