高熵合金 - 图文

南 京 工 程 学 院

毕业设计说明书(论文)

作 者： 李扬扬 学 号： 205090628 学院（系、部）： 材料工程学院 专 业： 材料成型及控制工程 题 目： Al0.4FeCrNiCo1.5Ti0.3高熵合金SPS合成研究

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2014年6月 南 京

毕业设计说明书（论文）中文摘要

Al0.4FeCrNiCo1.5Ti0.3高熵合金SPS合成研究 本文采用粉末冶金法技术(SPS)制备Al0.4FeCrNiCo1.5Ti0.3高熵合金。采用XRD、SEM、微观硬度计、压缩试验机等研究Al0.4FeCrNiCo1.5Ti0.3高熵合金的微观组织及力学性能，结果表明：高能球磨10h高熵合金开始形成简单固溶体bcc和fcc相，球磨时间延长至50h，合金中仅有bcc和fcc相；SPS烧结的Al0.4FeCrCo1.5NiTi0.3高熵合金组织致密，硬度达到373HV，屈服强度1.80GPa，压缩强度为2.04 GPa，压缩变形量达到20.5%，断口形貌脆性断裂为主。 关键词：高熵合金；SPS；微观组织；力学性能； I

毕业设计说明书（论文）外文摘要

Title Study On Al0.4FeCrNiCo1.5Ti0.3 High Entropy Alloy By MA–SPS Technique Abstract: The Al0.4FeCrNiCo1.5Ti0.3 high entropy alloy were synthetized by MA–SPS technique. Alloying process and composition phase, microstructure; mechanical properties of composite were investigated by XRD,EDS and mechanical testing machine.The results show that the formation of FCC and BCC solid solution phase was during the MA process in 10h and the two of FCC and BCC solid solution phases were in the alloy after 50h milling. The densification alloy was produced by SPS ,and The yield strength , compressive strength, compression ratio and Vickers hardness of the alloy are 1.80 GPa ,2.03GPa, 20.5% and 373HV,the fracture morphology shows brittle fracture characteristics. Keywords: High Entropy Alloy; properties SPS; Microstructure; Mechanical II

南京工程学院毕业设计说明书（论文）

目 录

前 言 ............................................................................................................... 1 第一章 绪 论 ................................................................................................. 2

1.1 高熵合金的理论依据及定义 ........................................................................... 2 1.2 高熵合金的性能和应用 .................................................................................... 3 1.2.1 高熵合金的性能 ....................................................................................... 3 1.2.2高熵合金的应用 ........................................................................................ 3

1.3 高熵合金的制备现状及研究进展 ................................................................... 4

1.3.1 制备现状 .................................................................................................... 4 1.3.2 研究进展 .................................................................................................... 4 1.4 本文研究目的与内容 ........................................................................................ 7

1.4.1 研究目的 .................................................................................................... 7 1.4.2 研究内容 .................................................................................................... 7

第二章 实验材料及方法 ................................................................................... 8

2.1 实验仪器、材料 ................................................................................................. 8

2.1.1 实验仪器 .................................................................................................... 8 2.1.2 实验材料 .................................................................................................. 10 2.1.3 表征设备 .................................................................................................. 11

第三章 Al0.4FeCrNiCo1.5Ti0.3高熵合金粉体制备及SPS合成 .......................... 13

3.1 Al0.4FeCrNiCo1.5Ti0.3高熵合金粉体制备工艺 ............................................. 13

3.1.1 配制合金粉末 ......................................................................................... 13 3.1.2 混粉 .......................................................................................................... 13 3.1.3球磨 ............................................................................................................ 13 3.1.4 干燥 .......................................................................................................... 14 3.2 Al0.4FeCrNiCo1.5Ti0.3高熵合金SPS合成 ..................................................... 14 第四章 实验结果与分析 .................................................................................. 16

4.1 粉体XRD分析 ................................................................................................. 16 4.2 SPS成型XRD分析 ...................................................................................... 17 4.3 Al0.4FeCrNiCo1.5Ti0.3组织性能 ................................................................... 18

4.3.1 Al0.4FeCr Co1.5 Ni Ti0.3的微观组织 ............................................... 18

III

南京工程学院毕业设计说明书（论文）

4.3.2 Al0.4FeCrNiCo1.5Ti0.3的EDS分析 ...................................................... 20 4.4 力学性能 ............................................................................................................ 22

4.4.1 Al0.4FeCrNiCo1.5Ti0.3 硬度及压痕 .................................................. 22 4.4.2 Al0.4FeCrNiCo1.5Ti0.3压缩性能 ........................................................ 24 4.4.3 Al0.4FeCrNiCo1.5Ti0.3 断口形貌 ................................................. 24 4.5 本章小结 ..................................................................................................... …… 此处隐藏：3523字，全部文档内容请下载后查看。喜欢就下载吧 ……