Prediction ofrelativeglobularization rates in α + βtitanium alloys as a function of initial crystal orientation

Benjamin A. Begley; Keith Markham; Michael Mizak; Adam L. Pilchak; Victoria M. Miller

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Prediction ofrelativeglobularization rates in α + βtitanium alloys as a function of initial crystal orientation

机译：α+β钛合金的预测αα+β钛合金的函数初始晶体取向

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The breakdown of the columnar grains and lamellar α + β colony microstructure in two-phase Ti alloys during conversion of ingot to billet is critical to the development of desired combination of mechanical properties. Colony breakdown occurs during a series of thermomechanical processing steps in the α + β phase field. However, fundamental knowledge of the microstructural dependence of this transformation is limited, particularly its dependence on the initial orientation of the α + β colony relative to the imposed strain-path. In this study, the viscoplastic self-consistent polycrystal plasticity model is used to examine deformation behavior as a function of crystal loading direction. Criteria were developed to predict relative globularization rates; it was found that both slip system activities in the a phase and relative crystal rotations of each phase must be considered. Predictions are demonstrated to be consistent with literature and suggest that further experimental investigation of relative globularization rates is necessary.

机译：在铸锭转换期间，两相Ti合金中柱状晶粒和层状αα+β菌落组织的衰弱是对机械性能所需组合的发展至关重要。在α+β相区域的一系列热机械处理步骤期间发生殖民地击穿。然而，对该转化的微观结构依赖性的基本知识是有限的，特别是其对α+β菌落相对于施加的应变路径的初始取向的依赖性。在该研究中，用于检查作为晶体负载方向的函数的变形行为的粘胶自给自一致的多晶塑性模型。制定标准以预测相对球间率;发现必须考虑在每个阶段的相位和相对晶振中的滑动系统活动。证明预测与文献一致，并表明需要进一步的对相对球率的实验研究。

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《Journal of Materials Research》 |2020年第8期|1113-1120|共8页
作者
Benjamin A. Begley; Keith Markham; Michael Mizak; Adam L. Pilchak; Victoria M. Miller;
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Department of Materials Science and Engineering University of Florida Gainesville Florida 32611 USA;

Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina 27695 USA;

Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina 27695 USA;

Air Force Research Laboratory Materials and Manufacturing Directorate Wright-Patterson AFB Ohio 45433 USA;

Department of Materials Science and Engineering University of Florida Gainesville Florida 32611 USA Air Force Research Laboratory Materials and Manufacturing Directorate Wright-Patterson AFB Ohio 45433 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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正文语种 eng
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Prediction ofrelativeglobularization rates in α + βtitanium alloys as a function of initial crystal orientation

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