电压和激光模式对三维原子探针测试结果的影响
Effects of Voltage and Laser Modes on Test Results of Three-Dimensional Atom Probe
摘 要
将Fe-CuMnNiAl钢淬火后在450 ℃回火4 h，分别在电压和激光模式下，用三维原子探针（3DAP）对其进行测试，对比研究了两种模式对测试结果的影响。结果表明：与电压模式相比，激光模式下的数据背底较小，质量分辨率较好，成分分析结果较准确，蒸发离子价态二价减少，一价增多，甚至出现两个原子同时蒸发的离子团；另外，激光模式下测得的析出相尺寸稍大，数量密度稍低，析出相核心铜元素含量较低。
激光模式
三维原子探针(3DAP)
析出相
voltage mode
laser mode
three-dimensional atom probe (3DAP)
precipitate
Abstract
Fe-CuMnNiAl steel was quenched to room temperature and then tempered at 450℃ for 4 h. The tempered steel specimens were tested by three-dimensional atom probe (3DAP) under voltage mode and laser mode respectively to study the effects of different modes on the test results. The results show that the background of the data was smaller, the mass resolution was higher, the composition analysis results was more accurate under the laser mode compared with those under the voltage mode. Under the laser mode, the divalent evaporation ions were reduced, while the monovalent ions increased, and two atom group evaporated at the same time even more. It is found that the precipitate was bigger in size and was slightly lower in density under the laser mode than under the voltage mode, and the core Cu content of precipitate was lower under the laser mode.
中图分类号 TH87 DOI 10.11973/lhjy-wl201806001
所属栏目 试验与研究
基金项目 国家重点研发计划资助项目（No.2016YFB0700401）；国家自然科学基金委员会-中国工程物理研究院NSAF联合基金资助项目（No.U1530115）；上海市科学技术委员会重点项目（12JC1404000）；上海市科委科学仪器化学试剂专项（17142203100）
收稿日期 2017/7/11
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备注沈琴(1992-),女,博士研究生,主要从事金属材料中纳米析出相研究
引用该论文: SHEN Qin,WANG Zemin,LI Hui,LIU Wenqing. Effects of Voltage and Laser Modes on Test Results of Three-Dimensional Atom Probe[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2018, 54(6): 385～389
沈琴,王泽民,李慧,刘文庆. 电压和激光模式对三维原子探针测试结果的影响[J]. 理化检验－物理分册, 2018, 54(6): 385～389
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【2】LI H,XIA S,ZHOU B X,et al. C-Cr segregation at grain boundary before the carbide nucleation in alloy 690[J]. Materials Characterization,2012,66:68-74.
【3】WANG X J,SHA G,SHEN Q,et al. Age-hardening effect and formation of nanoscale composite precipitates in a NiAlMnCu-containing steel[J]. Materials Science and Engineering:A,2015,627:340-347.
【4】SHEN Q,CHEN H,LIU W Q. Effect of Cu on nanoscale precipitation evolution and mechanical properties of a Fe-NiAl alloy[J]. Microscopy and Microanalysis,2017,23(2):350-359.
【5】WANG Z M,FANG X L,LI H,et al. Atom probe tomographic characterization of nanoscale Cu-rich precipitates in 17-4 precipitate hardened stainless steel tempered at different temperatures[J]. Microscopy and Microanalysis,2017,23(2):340-349.
【6】徐刚,蔡琳玲,冯柳,等. 利用APT对RPV模拟钢中界面上原子偏聚特征的研究[J]. 金属学报,2012,48(7):789-796.
【7】MILLER M K,FORBES R G. Atom probe tomography[J]. Materials Characterization,2009,60(6):461-469.
【8】VELLA A,VURPILLOT F,GAULT B,et al. Evidence of field evaporation assisted by nonlinear optical rectification induced by ultrafast laser[J]. Physical Review: B,2006,73: 165416.
【9】CEREZO A,CLIFTON P H,GOMBERG A,et al. Aspects of the performance of a femtosecond laser-pulsed 3-dimensional atom probe[J]. Ultramicroscopy,2007,107(9):720-725.
【10】BLAVETTE D,KASSAB A T,CADEL E,et al. Laser-assisted atom probe tomography and nanosciences[J]. International Journal of Materials Research,2008,99(5):454-460.
【11】巴发海,李勇,李凯. 新版X射线残余应力测定国标中的新技术与新要求[J]. 理化检验(物理分册),2017,53(9):615-623.
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