Deformation microstructure and tensile properties of Alloy 709 at different temperatures
Deformation microstructure and tensile properties of Alloy 709 at different temperatures
复制标题
709合金不同温度下的变形显微组织和拉伸性能
DOI：
10.1016/j.matdes.2019.107843
复制
发表时间：
2019
影响因子：
8.4
通讯作者：
Ding R
中科院分区：
文献类型：
--
作者：
Ding R
709奥氏体不锈钢是下一代快中子反应堆的候选结构材料，其工作温度为500~550 °C。然而，对709合金的变形机制和时效后的拉伸响应的研究还很缺乏。因此，本研究研究了709合金在室温、550、650和750 °C下的拉伸行为及其变形组织和失效机制。时效导致晶界和晶内颗粒的形成，从而导致屈服强度的提高和塑性的降低。这两种材料的极限强度都强烈依赖于温度，随着温度的升高，极限强度明显降低。这是由于应变硬化能力下降、动态应变时效和动态回复以及不同温度下的动态再结晶共同作用造成的。
Alloy 709 austenitic stainless steel is being investigated as a candidate structural material for the next generation fast neutron reactors at service temperature of 500–550 °C. However, the study of deformation mechanisms on Alloy 709 and of tensile response of aged Alloy 709 is lacking. In this study, thus, the tensile behaviour of as-received and aged Alloy 709, their deformation microstructures and failure mechanisms, have been investigated at room temperature (RT), 550, 650 and 750 °C. Aging brought about the formation of particles at grain boundaries and interior of grain, thus leading to enhancement of yield strength but reduction in ductility. The ultimate strength of both materials is strongly temperature dependent, which clearly decreases with temperature. It is caused by the decreasing strain hardening ability, dynamic strain aging and dynamic recovery together with dynamic recrystallisation at different temperatures.
DOI：
10.1016/j.msea.2018.06.089
发表时间：
2018
期刊：
Materials Science and Engineering: A
影响因子：
--
作者：
S. Upadhayay;Hangyue Li;P. Bowen;A. Rabiei
通讯作者：
A. Rabiei
影响因子：
4.7
作者：
Ding, Rengen;Yan, Jin;Bowen, Paul
通讯作者：
Bowen, Paul