摘要
采用放电等离子烧结(SPS)技术制备了Ti_(2)AlNb合金,研究烧结温度对Ti_(2)AlNb合金微观组织及力学性能的影响,并使用电子万能试验机及维氏硬度仪对其拉伸性能及硬度进行测试。结果表明:烧结温度为1000℃时,Ti_(2)AlNb合金因为析出O相最多,所以其高温拉伸性能最佳、硬度最高。随着烧结温度的升高,析出O相变少,高温拉伸性能及硬度均降低。对1200℃烧结制备的Ti_(2)AlNb合金进行不同工艺的热处理。热处理后,Ti_(2)AlNb合金的组织由等轴组织转变为魏氏组织,且采用炉冷方式冷却的Ti_(2)AlNb合金组织细化最明显,析出O相最多,硬度最高。
Ti_(2)AlNb alloy was prepared using spark plasma sintering(SPS)technology,the effect of sintering temperature on microstructure and mechanical properties of the Ti_(2)AlNb alloy was studied,and its tensile properties and hardness were tested using an electronic universal testing machine and a Vickers hardness tester.The results show that when the sintering temperature is 1000℃,the Ti_(2)AlNb alloy has the best high-temperature tensile performance and the highest hardness due to the precipitation of the most O phase.As the sintering temperature increases,the precipitation amount of the O phase decreases,and the high-temperature tensile performance and hardness decrease.Heat treatment of the Ti_(2)AlNb alloy prepared by sintering at 1200℃with different processes was carried out.After heat treatment,the microstructure of the Ti_(2)AlNb alloy changes from equiaxed structure to Weinstein structure,and the Ti_(2)AlNb alloy cooled by furnace cooling has the most obvious refinement of microstructure,the most precipitated O phase,and the highest hardness.
作者
曹子文
朱明
浦智能
康兴
秦晓晨
刘承泽
CAO Zi-wen;ZHU Ming;PU Zhi-neng;KANG Xing;QIN Xiao-chen;LIU Cheng-ze(School of Materials Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Xi’an Rare Metal Materials Research Institute,Xi’an 710016,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2024年第8期77-84,共8页
Transactions of Materials and Heat Treatment
基金
陕西省创新能力支撑计划(2023KJXX-095)
国家自然科学基金青年基金(52203383)。
