Effects of swaging and annealing on the microstructure and mechanical properties of ZrC dispersion-strengthened tungsten
Effects of swaging and annealing on the microstructure and mechanical properties of ZrC dispersion-strengthened tungsten
复制标题
型锻和退火对ZrC弥散强化钨显微组织和力学性能的影响
DOI：
10.1016/j.ijrmhm.2018.05.018
复制
发表时间：
2018-11-01
影响因子：
3.6
通讯作者：
Liu, C. S.
中科院分区：
文献类型：
--
作者：
Liu, R.;Xie, Z. M.;Liu, C. S.
采用高温回转锻造法制备了力学性能提高、高温稳定性优良的纳米级ZRC弥散强化钨合金(W-0.5wt%ZRC)棒材。研究了锻造和退火对W-0.5wt%ZRC合金组织和性能的影响。锻态W-0.5%ZRC棒材在200℃时表现出明显的塑性，总延伸率为4.2%，抗拉强度为724 Mpa，500℃时强度仍高达547 Mpa，总延伸率为28%。塑性-脆性转变温度(DBTT)约为200℃。锻造W-0.5wt%ZRC的再结晶起始温度约为1500℃，比轧制纯W高约300℃。
Nano-sized ZrC dispersion strengthened tungsten alloy (W-0.5wt%ZrC) rods with enhanced mechanical properties and superior high-temperature stability were fabricated by high temperature rotary swaging. The effects of swaging and annealing on the microstructure and mechanical properties of W-0.5wt%ZrC alloys were investigated. The as-swaged W-0.5%ZrC rod showed noticeable ductility at 200 degrees C with a total elongation of 4.2% and a tensile strength of 724 MPa, and at 500 degrees C the strength remains as high as 547 MPa and the total elongation is 28%. The ductile-to-brittle transition temperature (DBTT) is about 200 degrees C. The recrystallization start temperature of swaged W-0.5wt%ZrC is about 1500 degrees C, which is about 300 degrees C higher than that of rolled pure W. The possible mechanisms for the enhanced mechanical properties and thermal stability were discussed.