Evolution of texture in precision seamless tubes investigated by synchrotron and neutron radiation measurement
Evolution of texture in precision seamless tubes investigated by synchrotron and neutron radiation measurement
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DOI：
10.1016/j.matchar.2019.03.041
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发表时间：
2019-05
影响因子：
4.7
通讯作者：
F. Foadian;A. Carradó;H. Brokmeier;W. Gan;N. Schell;N. Al-hamdany;H. Palkowski
中科院分区：
文献类型：
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作者：
F. Foadian;A. Carradó;H. Brokmeier;W. Gan;N. Schell;N. Al-hamdany;H. Palkowski
许多应用都需要高精度的尺寸管。然而，以经济有效的方式生产高质量的管材仍然存在一些困难和挑战。在克劳斯塔尔技术大学冶金研究所最近的工作中，通过引入模具的动态倾斜和移位来优化管材拉拔工艺。这些方法使得控制壁厚变化甚至残余应力(RSS)的演化成为可能。然而，尽管众所周知，晶体织构对材料性能有显著影响，但对织构演化的可能影响还没有被研究过。此外，初始织构明显影响塑性变形过程中的微观组织演化，进而影响RSS演化和尺寸精度。本文介绍了斜模拉拔管材时织构的演变和非均质性。测量是用同步加速器和中子衍射法进行的。其目的是了解材料在不对称拉拔过程中因模具倾斜而产生的行为，并将偏心和残余应力之间的影响联系起来。研究了极图和ODF密度，分析了不同织构成分的产生和变化。
High precision dimensionality tubes are required for a number of applications. Nevertheless, there are some troubles and challenges to produce high quality tubes in a cost-effective way. In recent works done at the Institute of Metallurgy at Clausthal University of Technology, the tube drawing process was optimized by introducing dynamic tilting and shifting of the die. These methods made it possible to control the wall-thickness variation and even residual stresses (RSs) evolution. A possible influence on texture evolution, however, has not yet been investigated, though it is well known that the crystallographic texture has a remarkable effect on materials' properties. Furthermore, the initial texture clearly influences the microstructural evolution during plastic deformation, affecting the RSs evolution and dimension accuracy, too. In this paper the evolution and heterogeneity of the texture are introduced for tube drawing performed with a tilted die. The measurements were done using synchrotron and neutron diffraction methods. The aim was to understand the behavior of the material during the asymmetrical tube drawing, caused by the tilted die, and connect the effects between eccentricity and residual stresses. Pole figures and ODF densities were studied and the creation and variation of different texture components were analyzed as well.