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電子束定向能量沉積Fe-Mo功能梯度材料的微觀組織及性能
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1.南京航空航天大學(xué) 材料科學(xué)與技術(shù)學(xué)院，江蘇 南京 211100;2.面向苛刻環(huán)境的材料制備與防護技術(shù)工業(yè)和信息化部重點實驗室，江蘇 南京 210016;3.烏克蘭國立技術(shù)大學(xué) 伊戈爾·西科爾斯基基輔理工學(xué)院，烏克蘭 基輔 03056

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National Natural Science Foundation of China, China (Grant No. 51975286)


Microstructure and Properties of Fe-Mo Functionally Graded Materials Fabricated by Electron Beam-Directional Energy Deposition
Author:
Affiliation:

1.College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China;2.Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology, Nanjing 210016, China;3.Igor Sikorsky Kyiv Polytechnic Institute, National Technical University of Ukraine, Kyiv 03056, Ukraine

Fund Project:

National Natural Science Foundation of China (51975286)

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    摘要:

    利用電子束定向能量沉積（EB-DED）技術(shù)，制備了沿成分梯度方向從100% 304不銹鋼到100% Mo的不同成分變化率的Fe-Mo功能梯度材料（FGMs），包括成分突變100%、成分變化率10%和成分變化率30% 3種試樣。結(jié)果表明，成分變化率顯著影響試樣的顯微組織和力學(xué)性能。在成分突變的試樣中，304不銹鋼和Mo之間成分急劇變化導(dǎo)致了兩種材料界面附近的組織形態(tài)和硬度有很大的差異。而隨梯度層數(shù)的增加，成分沿沉積高度方向連續(xù)變化，顯微組織形貌呈現(xiàn)出從304不銹鋼到Mo的平滑過渡，由柱狀晶逐漸轉(zhuǎn)變?yōu)闃渲Аe、Mo等主要元素沿梯度方向呈線性轉(zhuǎn)變，沉積層間擴散充分，冶金結(jié)合良好。成分梯度變化越小，沿沉積方向的顯微硬度值越大。當(dāng)成分梯度為10%時，梯度層顯示出更高的硬度（最高達(dá)940 HV）和優(yōu)異的抗表面磨損性能，且試樣整體壓縮性能較好，頂部區(qū)域的壓縮斷裂應(yīng)力達(dá)到750.05±14 MPa。

    Abstract:

    Fe-Mo functionally graded materials (FGMs) with different composition-change rates from 100% 304 stainless steel to 100% Mo along the composition gradient direction were prepared by electron beam-directed energy deposition (EB-DED) technique, including three samples with composition mutation of 100%, composition change rate of 10% and 30%. Results show that the composition-change rate significantly affects the microstructure and mechanical properties of the samples. In the sample with abrupt change of composition, the sharp shift in composition between 304 stainless steel and Mo leads to a great difference in the microstructure and hardness near the interface between the two materials. With the increase in the number of gradient layers, the composition changes continuously along the direction of deposition height, and the microstructure morphology shows a smooth transition from 304 stainless steel to Mo, which is gradually transformed from columnar crystal to dendritic crystal. Elements Fe, Mo, and other major elements transform linearly along the gradient direction, with sufficient interlayer diffusion between the deposited layers, leading to good metallurgical bonding. The smaller the change in composition gradient, the greater the microhardness value along the deposition direction. When the composition gradient is 10%, the gradient layer exhibits higher hardness (940 HV) and excellent resistance to surface abrasion, and the overall compressive properties of the samples are better, with the compressive fracture stress in the top region reaching 750.05±14 MPa.

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李丹妮,姚正軍,姚孟欣,張叔賢,Oleksandr Moliar, Tetiana Soloviova, Iryna Trosnikova, Petro Loboda,張莎莎.電子束定向能量沉積Fe-Mo功能梯度材料的微觀組織及性能[J].稀有金屬材料與工程,2025,54(3):554~568.[lidanni, Yaozhengjun, Yaomengxin, Zhangshuxian, Oleksandr Moliar, Tetiana Soloviova, Iryna Trosnikova, Petro Loboda, Zhangshasha. Microstructure and Properties of Fe-Mo Functionally Graded Materials Fabricated by Electron Beam-Directional Energy Deposition[J]. Rare Metal Materials and Engineering,2025,54(3):554~568.]
DOI：10.12442/j. issn.1002-185X.20240549

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  • 收稿日期:2024-08-23
  • 最后修改日期:2024-09-06
  • 錄用日期:2024-09-23
  • 在線發(fā)布日期: 2025-03-25
  • 出版日期: 2025-03-25