A phase-field model investigating the role of elastic strain energy during the growth of closely spaced neighbouring interphase precipitates
A phase-field model investigating the role of elastic strain energy during the growth of closely spaced neighbouring interphase precipitates
复制标题
研究弹性应变能在紧密相邻的相间析出物生长过程中的作用的相场模型
DOI：
10.1016/j.commatsci.2017.09.053
复制
发表时间：
2018
影响因子：
3.3
通讯作者：
Rahnama A
中科院分区：
文献类型：
--
作者：
Rahnama A
采用多相场方法研究了相变应变对微合金钢相变动力学、热力学稳定性和相间析出物配对的影响。该模型保存在弹性不均匀相之间的扩散界面的应力均匀性，并提供了一个解释的机制，导致在配对的两个相邻的相间沉淀。已经考虑了几种非均匀弹性条件的情况。模拟的情况下，只有界面能被认为是有助于转化表明，这种能量可以导致建立两个相邻的沉淀物之间的颈部。然而，如果给予足够的时间，其中一个沉淀物将完全溶解到其相邻的颗粒中。另一方面，当应变和界面能都作用于系统时，颗粒之间的桥变得稳定，导致颗粒配对。这是由于两个颗粒之间的颈部产生的过度应变场导致颗粒倾向于最小化应变能的结果。
A multi-phase field method is developed to investigate the effects of transformation strain on the transformation kinetics, thermodynamic stability and pairing of interphase precipitates in micro-alloyed steels. The model conserves homogeneity of stress in the diffuse interface between elastically inhomogeneous phases and provides an explanation of the mechanism resulting in the pairing of two adjacent interphase precipitates. Several scenarios of inhomogeneous elastic conditions have been considered. The simulations for a situation where only the interfacial energy is considered to contribute to the transformation show that this energy can lead to the establishment of a neck between two neighbouring precipitates. However, if sufficient time is given, one of the precipitates will completely dissolve into its neighbouring particle. On the other hand, when both strain and interfacial energies act on the system, the bridge between the particles becomes stabilised leading to the pairing of the particles. This is a result of the particles tendency to minimise the strain energy due to the excessive strain field generated by the neck between the two particles.
DOI：
10.1098/rspa.1940.0072
发表时间：
1940-07-01
影响因子：
--
作者：
Nabarro, FRN
通讯作者：
Nabarro, FRN
Fe-C-X合金中溶质拖拽效应对铁素体生长的影响
影响因子：
4.5
作者：
H. Aaronson;S. Liu;W. Reynolds;G. Shiflet
通讯作者：
G. Shiflet