Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 23, Issue 1, Pages 23-31Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(13)62424-3
Keywords
titanium alloy; texture; twinning; microstructure; drawing; stress state; cold rolling; drawing-bulging
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Funding
- National Basic Research Program of China [2010CB731701]
- National Natural Science Foundation of China [50805121, 51175428]
- National Natural Science Foundation of China for Key Program [50935007]
- Foundation for Fundamental Research of Northwestern Polytechnical University in China [NPU-FFR-JC20100229]
- Foundation of the State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology [2011-P06]
- Program of Introducing Talents of Discipline to Universities (111), China [B08040]
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Three different stress states of the combination of tensile (t) stress and compressive (c) stress, t-t, t-c and t-c-c, exist in the deformed commercially pure titanium (CP-Ti) sheet during cold drawing-bulging. The textures and microstructures in the different stress state regions were investigated by means of XRD and TEM analysis. Similar development of texture and microstructure is achieved with less thickness strain under multiaxial stresses in drawing-bulging than in cold rolling. The results show that texture and microstructure are much sensitive to multiaxial stresses. Twinning is more easily activated under compressive stress than tensile stress. Prism < a > slip is heavily affected by tensile stress, resulting in a remarkable change of the intensity of (0 degrees, 35 degrees, 0 degrees) texture, while pyramidal < c+a > slip, forming (20 degrees 35 degrees, 30 degrees) texture, weakens with the increase of thickness strain in spite of stress state.
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