黄元盛,温立哲.退火处理对 Al3CoCrCu1/2FeMoNiTi 高熵合金激光涂层组织和性能的影响[J].表面技术,2016,45(7):162-166.
HUANG Yuan-sheng,WEN Li-zhe.Effect of Annealing on the Microstructure and Property of Al3CoCrCu1/2FeMoNiTi High-entropy Alloy Laser Coating[J].Surface Technology,2016,45(7):162-166
退火处理对 Al3CoCrCu1/2FeMoNiTi 高熵合金激光涂层组织和性能的影响
Effect of Annealing on the Microstructure and Property of Al3CoCrCu1/2FeMoNiTi High-entropy Alloy Laser Coating
投稿时间:2016-03-30  修订日期:2016-07-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.07.027
中文关键词:  高熵合金  退火  激光熔覆  时效硬化  硬度  固溶强化  位错
英文关键词:high-entropy alloy  annealing  laser cladding  age hardening  hardness  solid solution strengthening  dislocation
基金项目:广东省自然科学基金(2014A030313784);江门市科技计划项目(2014—2016)
作者单位
黄元盛 江门职业技术学院 材料技术系, 广东 江门 529090 
温立哲 江门职业技术学院 材料技术系, 广东 江门 529090 
AuthorInstitution
HUANG Yuan-sheng Material Technology Department, Jiangmen Polytechnic, Jiangmen 529090, China 
WEN Li-zhe Material Technology Department, Jiangmen Polytechnic, Jiangmen 529090, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 研究 Al3CoCrCu1/2FeMoNiTi 高熵合金涂层的退火时效硬化及其强化机理。 方法 使用激光熔覆设备,在 40Cr 钢上制备了 Al3CoCrCu1/2FeMoNiTi 高熵合金涂层,对涂层进行了退火处理。使用X 射线衍射仪、扫描电子显微镜和显微硬度计对涂层进行了分析。结果 涂覆态涂层为 BCC 单相结构,经 300 ℃和 500 ℃退火,涂层仍然为 BCC 单相;700 ℃退火后,涂层析出了 NiTi 金属间化合物相;900 ℃退火后,涂层由 FCC 相及 NiTi 金属间化合物组成。涂覆态和经 300~700 ℃退火的涂层为胞粒状,经900 ℃退火后,涂层为板条状。经 300 ℃退火,涂层硬度下降, 但超过 300 ℃退火,硬度比涂覆态的高。700 ℃退火合金硬度达到最大值 924HV。退火温度升到 900 ℃后,硬度比 700 ℃退火的低。 NiTi 析出相促进了硬度提高,位错强化机制能较好解释该高熵合金的固溶强化现象。结论 Al3CoCrCu1/2FeMoNiTi合金涂层具有明显的时效硬化效应, 700 ℃退火可获得最佳的时效硬化效果。
英文摘要:
      Objective To investigate the annealing age hardening of Al3CoCrCu1/2FeMoNiTi high-entropy alloy coating and strengthening mechanism. Methods Al3CoCrCu1/2FeMoNiTi high-entropy alloy coating was deposited on 40Cr steel with laser cladding equipment, and then was annealed. X-ray diffractometer, scanning electron microscope and microhardness tester were employed to analyze microstructure and hardness. Results The original coating was of BCC single-phase structure. After annealing at 300 ℃ and 500 ℃, the coating was still of BCC structure. The coating annealed at 700 ℃ precipitated NiTi intermetallic compound phase. When the annealing temperature was 900 ℃, the coating was composed of FCC phase and NiTi. The coating SEM morphology that was annealed at 0~700 ℃ was granular. After annealing at 900 ℃, the morphology was like lath. The coating annealed at 300 ℃ had a lower hardness than that of non-annealed. The hardness increased when the annealing temperature was more than 300 ℃. It reached the highest about 924HV at 700 ℃. It then became lower at 900 ℃. NiTi phase precipitating improved the alloy hardness. Solid solution strengthening of high-entropy alloys could be explained by dislocation strengthening mechanism. Conclusion Al3CoCrCu1/2FeMoNiTi high-entropy alloy coating obviously shows age hardening effect. The alloy coating has the best hardness after annealing at 700 ℃.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第19850225位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: bmjs@surface-techj.com

渝公网安备 50010702501715号