A new method for quantifying anisotropic martensitic transformation strains accumulated during constrained cooling
A new method for quantifying anisotropic martensitic transformation strains accumulated during constrained cooling
复制标题
量化约束冷却过程中积累的各向异性马氏体转变应变的新方法
DOI：
10.1016/j.msea.2014.06.012
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Mark A
中科院分区：
文献类型：
--
作者：
Mark A
Martensitic phase transformations during welding can play a major role in determining the final residual stresses and they can be anisotropic if the transformation occurs under stress. Traditionally, the Satoh test has been used to quantify the response, but it suffers from the fact that the temperature is not uniform along the specimen length, making it difficult to interpret the data. This shortcoming is overcome in our new experimental method using digital image correlation (DIC) to quantify the temperature dependent evolution of the transformation strain locally both parallel and perpendicular to an applied load, in this case for a high-strength low alloy (HSLA) steel and a tough, low transformation temperature weld consumable designed to mitigate tensile weld residual stresses. The method is able to separate the volumetric component of the transformation strain from the deviatoric transformation plasticity component. The volumetric component is shown to be independent of applied load, while the deviatoric component varies approximately linearly with applied load. For the HSLA steel studied here the method also reveals that the transformation start temperature rises under both tensile and compressive loading, confirming previous work. From a weld modelling viewpoint our method provides sufficient information to include the stress dependency of the anisotropic transformation strain in numerical finite element models of the weld process.
约束装配中的应力累积：新颖的 Satoh 测试配置
影响因子：
3.3
作者：
A. Shirzadi;H. Bhadeshia
通讯作者：
H. Bhadeshia
影响因子：
1.6
作者：
Grant, B. M. B.;Stone, H. J.;Preuss, M.
通讯作者：
Preuss, M.