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首页> 外文期刊>Optics & Laser Technology >Mechanical and corrosion behavior of titanium alloys additively manufactured by selective laser melting - A comparison between nearly beta titanium, alpha titanium and alpha plus beta titanium
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Mechanical and corrosion behavior of titanium alloys additively manufactured by selective laser melting - A comparison between nearly beta titanium, alpha titanium and alpha plus beta titanium

机译：选择性激光熔化加钛合金的机械和腐蚀行为 - 近β钛，α钛和α加β钛的比较

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摘要

Mechanical and corrosion behaviors of SLM-processed Ti-13Nb-13Zr alloy with primarily beta phase and acicular martensitic alpha' microstructure, CP Ti in martensitic alpha' structure and Ti-6Al-4V with martensitic alpha' and a small amount of beta phase microstructural conditions were studied in this work. A factor f (tensile strength/elastic modulus) was used to define the mechanical performance and the Ti-13Nb-13Zr alloy exhibits the highest f (15.22 +/- 0.19) comparing with CP Ti (9.90 +/- 0.10) and Ti-6Al-4V (12.47 +/- 0.14). Among the three materials, Ti-13Nb-13Zr alloy demonstrates lower stress-controlled fatigue resistance but higher strain-controlled fatigue performance than CP Ti and Ti-6Al-4V. Fatigue crack initiation occurred in the surface/subsurface pores and the river pattern was observed in the crack initiation zone and crack propagation zone. The results of the potentiodynamic polarization indicate that the Ti-13Nb-13Zr alloy has the highest corrosion potential comparing with that of CP Ti and Ti-6Al-4V alloy because that Nb2O5 is more chemically stable than V2O5 and solid layers of Nb2O and ZrO2 are existed in passive TiO2 layers during the corrosion process which could reduce the Cl- ingress into the oxide layer and increase the structural integrity of the oxide film.
机译：SLM加工Ti-13NB-13ZR合金的机械和腐蚀行为主要是β相和针状马氏体α'微观结构，CP Ti在马氏体α结构和马氏体α的Ti-6Al-4V中的含量和少量β相微观结构在这项工作中研究了条件。使用因子f（拉伸强度/弹性模量）来定义机械性能，Ti-13NB-13Zr合金表现出与Cp Ti（9.90 +/- 0.10）和Ti-相比的最高F（15.22 +/- 0.19） 6AL-4V（12.47 +/- 0.14）。在三种材料中，Ti-13NB-13ZR合金表明低应激控制的疲劳性，但比Cp Ti和Ti-6al-4V更高的应变控制的疲劳性能。在裂纹引发区和裂纹传播区观察到表面/地下孔隙中发生疲劳裂纹引发和河流模式。电位偏振的结果表明Ti-13NB-13ZR合金具有与CP Ti和Ti-6Al-4V合金相比的最高腐蚀电位，因为Nb2O5比V2O5更具化学稳定，Nb2O和ZrO2的固体层在腐蚀过程中存在于无源TiO2层中，这可以将Cl入口降低到氧化物层中并增加氧化物膜的结构完整性。

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  • 来源
    《Optics & Laser Technology》 |2019年第2019期|共12页
  • 作者

    Zhou Libo; Yuan Tiechui; Tang Jianzhong; He Jianjun; Li Ruidi;

  • 作者单位

    Cent S Univ ShenZhen Inst Cent South Univ State Key Lab Powder Met Changsha 410083 Hunan Peoples R China;

    Cent S Univ ShenZhen Inst Cent South Univ State Key Lab Powder Met Changsha 410083 Hunan Peoples R China;

    Zhuzhou Printing Addit Mfg Co Ltd Zhuzhou 412000 Peoples R China;

    Changsha Univ Sci &

    Technol Inst Energy &

    Powder Engn Changsha 410083 Hunan Peoples R China;

    Cent S Univ ShenZhen Inst Cent South Univ State Key Lab Powder Met Changsha 410083 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
  • 关键词

    Selective laser melting; Titanium alloy; Microstructure; Fatigue; Corrosion;

    机译：选择性激光熔化;钛合金;微观结构;疲劳;腐蚀;

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