中国激光, 2019, 46 (3): 0302003, 网络出版: 2019-05-09 复制并引用该论文  本文已被引 11 次  被引通知

图 & 表

图 1. 激光增材制造示意图

Fig. 1. Schematic of laser additive manufacturing

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图 2. 不同扫描速率下制备的熔覆层的XRD衍射图谱

Fig. 2. XRD diffraction spectra of cladding layers prepared at different scanning speeds

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图 3. 不同扫描速率下制备的试样的横截面形貌。(a) 4 mm/s,基体/熔覆层结合区;(b) 10 mm/s,基体/熔覆层结合区;(c) 16 mm/s,基体/熔覆层结合区;(d) β晶界;(e) 4 mm/s,熔覆层中部;(f) 10 mm/s,熔覆层中部;(g) 16 mm/s熔覆层中部;(h)基体

Fig. 3. Cross-section of samples prepared at different scanning speeds. (a) 4 mm/s, bonding zone of the substrate and cladding layer; (b) 10 mm/s, bonding zone of the substrate and cladding layer; (c) 16 mm/s, bonding zone of the substrate and cladding layer; (d) β-grain boundary; (e) 4 mm/s, middle of cladding layer; (f) 10 mm/s, middle of cladding layer; (g) 16 mm/s, cladding layer; (h) substrate

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图 4. 元素含量的EDS分析结果。(a)点D;(b)点E;(c)点F

Fig. 4. EDS analysis of element content. (a) Point D; (b) point E; (c) point F

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图 5. 不同扫描速率下制备的熔覆层的显微硬度测试结果。(a)显微硬度分布;(b)平均显微硬度;(c)偏差值

Fig. 5. Tested microhardness of cladding layer prepared at different scanning speeds. (a) Microhardness distribution; (b) average microhardness; (c) microhardness difference

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图 6. 不同扫描速率下制备的熔覆层的动电位极化曲线

Fig. 6. Polarization curves of dynamic potential of cladding layers prepared at different scanning speeds

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图 7. 不同扫描速率下制备的熔覆层的EIS结果。(a) Nyquist曲线;(b)波特图

Fig. 7. EIS results of cladding layers prepared at different scanning speeds. (a) Nyquist curves; (b) bode diagram

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图 8. 等效模拟电路图

Fig. 8. Equivalent simulated circuit diagram

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图 9. 不同扫描速率下制备的熔覆层在电化学腐蚀后的SEM照片。(a) 4 mm/s;(b) 10 mm/s;(c) 16 mm/s;(d)基体

Fig. 9. SEM images of cladding layers prepared at different scanning speeds. (a) 4 mm/s; (b) 10 mm/s; (c) 16 mm/s; (d) substrate

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表 1TC4钛合金粉末的化学成分

Table1. Chemical composition of TC4 alloy powders

Elements Ti Al V Fe C N H O Mass fraction /% Bal. 6.15 4.05 0.28 0.08 0.04 0.01 0.18

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表 2极化曲线的标准腐蚀参数

Table2. Standard corrosion parameters of polarization curve

Sample Ecorr /V icorr /(μA·cm-2) Epp /V vcorr /(mm·a-1) Rp /Ω Cladding layer (4 mm·s-1) -0.6884 4.6202 0.8884 0.054344 25144 Cladding layer (10 mm·s-1) -0.4371 1.2337 1.1871 0.014511 98966 Cladding layer (16 mm·s-1) -0.7065 9.4097 0.8565 0.110680 12975 Substrate -0.4822 0.6265 1.3322 0.007369 145800

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表 3等效模拟电路的电气参数

Table3. Electrical parameters of equivalent simulated circuit

Sample Rs /(Ω·cm-2) Qc-Y0 /(10-5 Ω-1·s-n·cm-2) n Rt /(Ω·cm-2) Cdl /(10-4 F·cm-2) Rct /(Ω·cm-2) e /% Cladding layer (4 mm·s-1) 1.810 4.673 0.907 2585 6.048 6506 <6.191 Cladding layer (10 mm·s-1) 1.425 2.608 0.918 13400 1.169 11500 <3.946 Cladding layer (16 mm·s-1) 1.592 15.52 0.908 1637 252.1 1332 <2.324 Substrate 1.258 2.191 0.778 1403 0.125 97390 <3.327

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表 4不同扫描速率下制备的熔覆层的点蚀参数

Table4. Pitting parameters of cladding layers prepared at different scanning speeds

Sample Eb /V Ep /V Eb-Ep /V Cladding layer (4 mm·s-1) -0.68257 0.24067 -0.92324 Cladding layer (10 mm·s-1) -0.31881 1.14370 -1.46251 Cladding layer (16 mm·s-1) -0.68937 0.27289 -0.97226 Substrate -0.23934 1.40060 -1.63994

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冯晓甜, 顾宏, 周圣丰, 雷剑波. 送粉式激光增材制造TC4钛合金熔覆层组织及电化学腐蚀行为的研究[J]. 中国激光, 2019, 46(3): 0302003. Xiaotian Feng, Hong Gu, Shengfeng Zhou, Jianbo Lei. Microstructure and Electrochemical Corrosion Behavior of TC4 Titanium Alloy Cladding Layer Prepared with Powder Feeding Laser Additive Manufacturing[J]. Chinese Journal of Lasers, 2019, 46(3): 0302003.