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学者姓名:贺定勇
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摘要 :
Metallic glass (MG) lattice structure is expected to exhibit high specific strength, high impact resistance, and corrosion resistance due to the combined advantages of MG and lattice structure. Laser powder bed fusion (LPBF) was employed to prepare the MG lattice structure in the present research. Firstly, the LPBF processing parameters were optimized to prepare nearly full amorphous state alloy (Zr41.2Ti13.8Cu12.5Ni10Be22.5) accompany with the high relative density. Under the optimal parameters, the LPBF-processed MG rod with Phi = 1 mm could achieve a high strength of 1428 MP and a plastic deformation strain of similar to 2 %. Two kinds of MG lattice structures including body-centered cubic (BCC) and thin wall (TW) were fabricated, and their microstructure characters and mechanical properties were investigated. The LPBF-processed MG TW lattice structure exhibited a more faithful reproduction of the designed model than the BCC lattice structure. Remarkable, TW lattice structure showed relatively higher specific strength (2.55x10(5) Nm/kg) and obvious plastic deformation strain (2 %) compared with the BCC lattice structure, which could be attributed to the less tension stress distribution and the multiplication of shear bands within the thin wall intersection regions under compression load.
关键词 :
Shear bands Shear bands Lattice structure Lattice structure Laser powder bed fusion Laser powder bed fusion High specific strength High specific strength Zr-based metallic glass Zr-based metallic glass
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GB/T 7714 | Tan, Zhen , Jiang, Xinyi , Xi, Zhao et al. Fabrication of Zr-based bulk metallic glass lattice structure with high specific strength by laser powder bed fusion [J]. | ADDITIVE MANUFACTURING , 2024 , 95 . |
MLA | Tan, Zhen et al. "Fabrication of Zr-based bulk metallic glass lattice structure with high specific strength by laser powder bed fusion" . | ADDITIVE MANUFACTURING 95 (2024) . |
APA | Tan, Zhen , Jiang, Xinyi , Xi, Zhao , Zhou, Ziqi , Wang, Benpeng , Li, Guoju et al. Fabrication of Zr-based bulk metallic glass lattice structure with high specific strength by laser powder bed fusion . | ADDITIVE MANUFACTURING , 2024 , 95 . |
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摘要 :
本发明涉及材料加工工程技术领域,具体为一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法。该粉芯丝材采用工业纯铝管包裹粉芯并经旋转锻造得到,所述粉芯包括铝合金粉末和Al2O3陶瓷粉末,所述粉芯中氧化铝陶瓷粉末的总含量≥30wt%。本发明通过调控粉芯丝成分并结合旋锻工艺,可制得高Al2O3含量的粉芯丝材,该粉芯丝材外表光滑、致密度高、热传导效率高,尤其适用于高耐磨性电弧喷涂涂层的制备,制备出的涂层与基体之间结合良好,涂层中无明显缺陷,陶瓷相分布均匀、沉积率高,因此硬度高,耐磨性好。
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GB/T 7714 | 周正 , 赵万新 , 姚海华 et al. 一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法 : CN202310009965.6[P]. | 2023-01-04 . |
MLA | 周正 et al. "一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法" : CN202310009965.6. | 2023-01-04 . |
APA | 周正 , 赵万新 , 姚海华 , 路洋 , 杨延格 , 臧勃林 et al. 一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法 : CN202310009965.6. | 2023-01-04 . |
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摘要 :
一种电弧增材制造高强Al‑Mg系合金成形件的方法,涉及铝合金增材制造领域。电弧增材制造(WAAM)工艺制备Al‑Mg系合金越来越受到广泛的关注,但目前已有的WAAM工艺制备Al‑Mg系合金强度不高,绝大部分无法达到工业使用的需求。本专利采用熔化极惰性气体保护(MIG)增材制造系统,以高镁焊丝(Mg 5.5~6.8wt%,Zr≤0.1wt%)为丝材,采用单道摆动的方式往复式逐层沉积成形,调控焊接工艺参数,获得成形优良的高强Al‑Mg系铝合金成形件,抗拉强度最高达365.0MPa,断后延伸率为25.5%,具有优良的强度和塑性结合。
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GB/T 7714 | 崔丽 , 翟利民 , 贺定勇 et al. 一种电弧增材制造高强Al-Mg系合金成形件的方法 : CN202310211381.7[P]. | 2023-02-27 . |
MLA | 崔丽 et al. "一种电弧增材制造高强Al-Mg系合金成形件的方法" : CN202310211381.7. | 2023-02-27 . |
APA | 崔丽 , 翟利民 , 贺定勇 , 黄晖 , 魏午 . 一种电弧增材制造高强Al-Mg系合金成形件的方法 : CN202310211381.7. | 2023-02-27 . |
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摘要 :
本发明涉及热障涂层表面腐蚀与防护技术领域,具体为一种抗熔融CMAS附着和腐蚀的热障防护层的制备方法,由下至上包括高温合金基材、YSZ层和NdYbZr2O7防护层;所述YSZ层为氧化钇稳定氧化锆;所述NdYbZr2O7防护层表面具有微米柱结构。本发明在YSZ层表面制备一层NdYbZr2O7防护层,具有优异的抗高温烧结和抗CMAS腐蚀性能,同时具备相对较低的表面能,有利于提高防护层抗熔融CMAS粘附和浸润性;利用表面规则排布的微米级凸台阵列和随机分布的大量纳米颗粒结构,能够进一步降低熔融CMAS在涂层表面的粘附和浸润倾向性,提升涂层的抗CMAS腐蚀性能。
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GB/T 7714 | 吴杨 , 李煜 , 智文博 et al. 抗熔融CMAS附着和腐蚀的热障防护层及其制备方法 : CN202310888607.7[P]. | 2023-07-19 . |
MLA | 吴杨 et al. "抗熔融CMAS附着和腐蚀的热障防护层及其制备方法" : CN202310888607.7. | 2023-07-19 . |
APA | 吴杨 , 李煜 , 智文博 , 贺定勇 . 抗熔融CMAS附着和腐蚀的热障防护层及其制备方法 : CN202310888607.7. | 2023-07-19 . |
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摘要 :
本发明公开了一种竹笋结构W‑Zr基非晶合金复合材料及其制备方法与应用,涉及金属复合材料技术领域,复合材料的整体结构上分别存在硬脆区和软韧区,其中硬脆区体积分数为10%~30%,软韧区体积分数为70%~90%,两区域呈锥形交替分布,其分布为仿生竹笋结构,这种竹笋结构的优势在于:在高应变速率条件下,软韧区先发生变形,随着变形程度增加,软韧区与硬脆区同时变形,随后硬脆区开裂,沿着设计结构方式分离脱落,重新露出尖锐区域完成自锐化,类似竹笋剥落;循环此步骤,完成侵彻过程,可显著增加穿甲弹威力。
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GB/T 7714 | 谈震 , 席钊 , 宁子阳 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3[P]. | 2023-01-17 . |
MLA | 谈震 et al. "一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用" : CN202310055654.3. | 2023-01-17 . |
APA | 谈震 , 席钊 , 宁子阳 , 贺定勇 , 周正 , 郭星晔 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3. | 2023-01-17 . |
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摘要 :
本发明涉及一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法,涉及增材制造技术及微通道散热技术领域。本发明利用激光增材制造技术,按照所设计微通道结构的模型进行切片处理、区域划分及激光扫描策略规划,通过不同区域的激光工艺参数、激光扫描策略与钨铜粉末比例匹配,一体成形制备出具有钨骨架结构的钨铜复合材料微通道散热器,随后对微通道进行磨粒流抛光后处理,使微通道具有适宜的内表面粗糙度。所制备的微通道散热器散热性能优良,热膨胀系数能与电子元件的基体材料相匹配,钨骨架显著改善散热器高温性能并实现结构功能一体化,为微电子领域提供更有效率、成本更低的散热解决方案。
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GB/T 7714 | 贺定勇 , 李小璇 , 谈震 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3[P]. | 2023-03-15 . |
MLA | 贺定勇 et al. "一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法" : CN202310249027.3. | 2023-03-15 . |
APA | 贺定勇 , 李小璇 , 谈震 , 郭星晔 , 邵蔚 , 周正 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3. | 2023-03-15 . |
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摘要 :
本发明涉及材料加工工程技术领域,具体为一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法,该粉芯丝材包括外皮和粉芯,所述粉芯包括粒径在15~75μm的铝合金粉末以及粒径分别在15~75μm和350~420μm的氧化铝陶瓷粉末,且所述粉芯中氧化铝陶瓷粉末的总含量≥20wt%,采用工业纯铝管包裹粉芯并经旋转锻造得到。本发明通过采用铝合金粉末和多尺度的Al2O3陶瓷粉末混合,能够得到具有致密度高、导热性好、均匀性好的粉芯丝材,进而显著提高电弧喷涂涂层的耐磨性。
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GB/T 7714 | 周正 , 路洋 , 姚海华 et al. 一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法 : CN202310010264.4[P]. | 2023-01-04 . |
MLA | 周正 et al. "一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法" : CN202310010264.4. | 2023-01-04 . |
APA | 周正 , 路洋 , 姚海华 , 赵万新 , 杨延格 , 臧勃林 et al. 一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法 : CN202310010264.4. | 2023-01-04 . |
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摘要 :
Friction stir welding (FSW) was introduced to join laser powder bed fusion (LPBF) AlSi10Mg alloys in this study. Microstructure and texture evolution, microhardness distribution and tensile properties of the FSW joints were investigated. The evolution of grain size, grain boundary and misorientation angles distribution, dynamic recrystallization and crystallographic texture in various regions of the FSW joint concerning base metal (BM), thermo-mechanically affected zone (TMAZ), upper part of nugget zone (UPNZ) and low part of nugget zone (LPNZ) was characterized by using electron back-scattered diffraction (EBSD). The analysis reveals a strong texture evolution of shear components on the TMAZ, UPNZ and LPNZ as well as a fully recrystallized grain structure on the UPNZ and LPNZ. Additionally, a gradual evolution in Si-rich eutectic from continuous cellular networks in the BM to totally globularized particles in the UPNZ and LPNZ occurs in the FSW joint. The microhardness rapidly decreases to the TMAZ from the BM through heat affected zone (HAZ) reaching the lowest value of -65.0 HV at the TMAZ/NZ boundary. The FSW joint in LPBF AlSi10Mg alloys exhibits an ultimate tensile strength (UTS) of 247 MPa and an elongation-to-failure (EI) of 8.8%. The UTS of FSW joints is reduced compared to the BM, but the EI has been increased by 160%, implying an improvement in tensile ductility.
关键词 :
Mechanical properties Mechanical properties Laser powder bed fusion Laser powder bed fusion Microstructure and texture Microstructure and texture AlSi10Mg alloys AlSi10Mg alloys Friction stir welding Friction stir welding
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GB/T 7714 | Cui, Li , Wu, Defan , Chang, Yaoqing et al. Microstructural evolution and mechanical property of friction stir welded joints in AlSi10Mg alloys fabricated by laser powder bed fusion [J]. | CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY , 2023 , 47 : 228-243 . |
MLA | Cui, Li et al. "Microstructural evolution and mechanical property of friction stir welded joints in AlSi10Mg alloys fabricated by laser powder bed fusion" . | CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY 47 (2023) : 228-243 . |
APA | Cui, Li , Wu, Defan , Chang, Yaoqing , Guo, Xingye , Wu, Xu , Shao, Wei et al. Microstructural evolution and mechanical property of friction stir welded joints in AlSi10Mg alloys fabricated by laser powder bed fusion . | CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY , 2023 , 47 , 228-243 . |
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摘要 :
The Mo-10Si-(0, 5, 10, 15)B (at.%) alloys located in Moss (Mo solid solution) +Mo3Si +T2 (Mo5SiB2) region were prepared by arc melting. The effect of B content on the microstructure, microhardness, fracture toughness and oxidation resistance of the alloys was studied. In the Mo-10Si alloy, there are primary Mo-ss and peritectic Mo3Si phases. With the addition of B, (Mo-ss + T2) binary and (Mo-ss + T2 + Mo3Si) ternary eutectics emerge in Mo-10Si-(5, 10)B alloys. For Mo-10Si-15B alloy, primary Moss disappears and the mi-crostructure is only composed of binary and ternary eutectics. With the increase of B content, the proportion and grain size of Mo-ss decrease. The microhardness of alloys increases with the increase of B content due to the increasing intermetallics. The fracture toughness of alloys decreases obviously in single-edge notched three-point bending testing (SENB) and the fracture mode transforms from transgranular fracture to intergranular fracture because of the refinement of Mo-ss. In the high-temperature oxidation test at 1250 degrees C, the oxidation weight loss of the alloys decreases with the addition of B due to the densification of the borosilicate layer. (C) 2021 Elsevier B.V. All rights reserved.
关键词 :
Microstructure Microstructure Oxidation resistance Oxidation resistance B content B content Mo-Si-B alloys Mo-Si-B alloys Fracture toughness Fracture toughness
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GB/T 7714 | Jin, Ming , He, Dingyong , Shao, Wei et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
MLA | Jin, Ming et al. "Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys" . | JOURNAL OF ALLOYS AND COMPOUNDS 890 (2022) . |
APA | Jin, Ming , He, Dingyong , Shao, Wei , Tan, Zhen , Guo, Xingye , Zhou, Zheng et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
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摘要 :
本发明涉及一种长时间可控流量高温水蒸气‑空气耦合腐蚀实验装置。本发明提供的装置包括:空压机、调压阀、蠕动泵、汽化器、转子流量计和管式高温炉;其中,空压机、调压阀、转子流量计和汽化器依次连接;水源供应单元、蠕动泵和汽化器依次连接;汽化器、管式高温炉和废液收集箱依次连接,管式高温炉中设有钼丝加固的氧化铝坩埚。本发明装置的结构简单,可长时间供气,双气源流量比例可控,更接近工件实际的工况环境,降低了随时更换气瓶、暂停实验带来的实验误差,更安全便利;能更加真实的模拟材料在高温水蒸气‑空气环境下的腐蚀失效情况,且操作简单、大大降低了实验成本。
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GB/T 7714 | 贺定勇 , 王鹏 , 郭星晔 et al. 一种长时间可控流量高温水蒸气-空气耦合腐蚀实验装置 : CN202211314151.5[P]. | 2022-10-25 . |
MLA | 贺定勇 et al. "一种长时间可控流量高温水蒸气-空气耦合腐蚀实验装置" : CN202211314151.5. | 2022-10-25 . |
APA | 贺定勇 , 王鹏 , 郭星晔 , 周正 , 崔丽 , 王国红 et al. 一种长时间可控流量高温水蒸气-空气耦合腐蚀实验装置 : CN202211314151.5. | 2022-10-25 . |
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