EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING

ZHANG HaiYing; DONG DengKe; SU ShaoPu; CHEN An

doi:10.16579/j.issn.1001.9669.2019.06.012

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EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING

更新时间：2022-09-22

- EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING
- Journal of Mechanical Strength Vol. 41, Issue 6, Pages: 1341-1344(2019)
- 作者机构：
  
  1. 中国飞机强度研究所三室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.06.012
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ZHANG HaiYing, DONG DengKe, SU ShaoPu, et al. EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING. [J]. 41(6):1341-1344(2019)
DOI：

ZHANG HaiYing, DONG DengKe, SU ShaoPu, et al. EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING. [J]. 41(6):1341-1344(2019) DOI： 10.16579/j.issn.1001.9669.2019.06.012.

摘要

采用激光选区熔化技术直接成形Ti-6Al-4V钛合金静力试验件,对部分试验件进行热处理或热等静压处理,并对三种状态的部分试验件进行表面打磨,通过试验对比研究了热处理/热等静压、表面处理等后处理工艺对激光选区熔化Ti-6Al-4V力学性能的影响。采用光学显微镜和扫描电镜对不同状态试验件的微观组织和断口形貌进行了观察,分析力学性能变化的原因。热处理和热等静压后,激光选区熔化Ti-6Al-4V钛合金试验件的极限强度有所下降,但延伸率提高约50%,韧性增强。表面打磨处理使热等静压态试验件屈服和极限强度均提高了约30 MPa,但未引起沉积态和热处理态试验件力学性能的明显改变。

Abstract

Ti-6 Al-4 V titanium alloy specimens were built using selective laser melting. Some specimens were heat treated and some were hot-isostatically pressed. Half of these specimens in three conditions were polished. Tensile test was conducted to research into the effect of heat treatment/hot-isostatic pressing and polish on the mechanical properties. The microstructure and fractography were observed using optical microscope and scanning electron microscope to find the reason for mechanical property modifications. The test results demonstrate that,after heat treatment or hot-isostatic pressing,the ultimate tensile strength of SLM Ti-6 Al-4 V is reduced significantly while the elongation is improved by around 50%. Polish results in the increase of yield and ultimate strength by about 30 MPa for hot-isostatic pressed specimens,but leads to no apparent improvement in mechanical properties for as-built and heat treated specimens.

关键词

激光选区熔化热处理热等静压表面粗糙度

Keywords

Selective laser meltingHeat treatmentHot-isostatic pressSurface roughness

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