Microstructural and processing factors influencing the formation of annealing twins
Microstructural and processing factors influencing the formation of annealing twins
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DOI：
10.1016/j.msea.2009.07.021
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发表时间：
2009-11-25
期刊：
影响因子：
6.4
通讯作者：
Richards, N. L.
中科院分区：
文献类型：
--
作者：
Cahoon, J. R.;Li, Qiangyong;Richards, N. L.
定量了解塑性应变后退火孪晶形成的过程和热力学参数，对于能够在商业规模上控制孪晶的制造过程是重要的。在本文中，对文献中仅有的两个以定量方式处理孪晶形成的现有出版物进行了修改。Pande等人的方程和Gleiter早先的方程都进行了修改，以考虑应变，然后与本文作者在商业纯镍上产生的文献和数据的结果进行比较。在3.0 ~ 7.5%的应变范围内，两种模型的理论预测结果吻合较好。同时指出，应变和温度在影响退火孪晶密度方面存在协同效应。这两个参数的优化使商业纯镍的退火孪晶密度达到2.3 x 10(4) m（-1）。(C) 2009 Elsevier B.V.版权所有
Quantitative understanding of the process and thermodynamic parameters involved in the formation of annealing twins after plastic straining, is important in being able to control the manufacturing process of twin generation on a commercial scale. In the present paper modifications are made to the only two existing publications in the literature that treat twin formation in a quantitative manner. Both the equations of Pande et al. and an earlier one by Gleiter, are modified to account for strain and then compared with results from the literature and data generated by the present authors on commercially pure nickel. Good agreement is made between the theoretical predictions of the two models suitably modified for strain values from 3.0 to 7.5%. It was also noted that there is a synergistic effect of strain and temperature in influencing the density of annealing twins. Optimization of both parameters results in the density of annealing twins in commercially pure nickel reaching a value of 2.3 x 10(4) m(-1). (C) 2009 Elsevier B.V. All rights reserved.