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通过激光粉末床熔融制造的热处理Ti-6Al-4V合金中的固态相变

Solid-State Phase Transformations in Thermally Treated Ti-6Al-4V Alloy Fabricated via Laser Powder Bed Fusion.

作者信息

Mengucci Paolo, Santecchia Eleonora, Gatto Andrea, Bassoli Elena, Sola Antonella, Sciancalepore Corrado, Rutkowski Bogdan, Barucca Gianni

机构信息

Dipartimento di Scienze e Ingegneria Della Materia, Dell'Ambiente de Urbanistica, Università Politecnica delle Marche, 60131 Ancona, Italy.

INSTM-Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, 50121 Firenze, Italy.

出版信息

Materials (Basel). 2019 Sep 6;12(18):2876. doi: 10.3390/ma12182876.

DOI:10.3390/ma12182876
PMID:31489893
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6765979/
Abstract

Laser Powder Bed Fusion (LPBF) technology was used to produce samples based on the Ti-6Al-4V alloy for biomedical applications. Solid-state phase transformations induced by thermal treatments were studied by neutron diffraction (ND), X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and energy-dispersive spectroscopy (EDS). Although, ND analysis is rather uncommon in such studies, this technique allowed evidencing the presence of retained β in α' martensite of the as-produced (#AP) sample. The retained β was not detectable by XRD analysis, nor by STEM observations. Martensite contains a high number of defects, mainly dislocations, that anneal during the thermal treatment. Element diffusion and partitioning are the main mechanisms in the α ↔ β transformation that causes lattice expansion during heating and determines the final shape and size of phases. The retained β phase plays a key role in the α' → β transformation kinetics.

摘要

采用激光粉末床熔融（LPBF）技术制备了基于Ti-6Al-4V合金的生物医学应用样品。通过中子衍射（ND）、X射线衍射（XRD）、扫描透射电子显微镜（STEM）和能谱分析（EDS）研究了热处理引起的固态相变。虽然，ND分析在这类研究中相当少见，但该技术能够证明在制备态（#AP）样品的α'马氏体中存在残留β相。XRD分析和STEM观察均未检测到残留β相。马氏体含有大量缺陷，主要是位错，这些缺陷在热处理过程中会发生退火。元素扩散和分配是α ↔ β转变中的主要机制，该转变在加热过程中会导致晶格膨胀，并决定相的最终形状和尺寸。残留β相在α' → β转变动力学中起关键作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/78baeae76eb1/materials-12-02876-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/9fb620ee9ac0/materials-12-02876-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/bd049ea42f33/materials-12-02876-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/53df384abe4e/materials-12-02876-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/16c9d544d888/materials-12-02876-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/26bfc9c2298f/materials-12-02876-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/78baeae76eb1/materials-12-02876-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/9fb620ee9ac0/materials-12-02876-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/bd049ea42f33/materials-12-02876-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/53df384abe4e/materials-12-02876-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/16c9d544d888/materials-12-02876-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/26bfc9c2298f/materials-12-02876-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cbc/6765979/78baeae76eb1/materials-12-02876-g006.jpg

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本文引用的文献

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2
Effects of build orientation and element partitioning on microstructure and mechanical properties of biomedical Ti-6Al-4V alloy produced by laser sintering.成型方向和元素分配对激光烧结制备的生物医学Ti-6Al-4V合金微观结构和力学性能的影响
J Mech Behav Biomed Mater. 2017 Jul;71:1-9. doi: 10.1016/j.jmbbm.2017.02.025. Epub 2017 Feb 24.
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Effects of thermal treatments on microstructure and mechanical properties of a Co-Cr-Mo-W biomedical alloy produced by laser sintering.
热处理对激光烧结制备的Co-Cr-Mo-W生物医学合金微观结构和力学性能的影响
J Mech Behav Biomed Mater. 2016 Jul;60:106-117. doi: 10.1016/j.jmbbm.2015.12.045. Epub 2016 Jan 8.
4
Structural characterization of biomedical Co-Cr-Mo components produced by direct metal laser sintering.采用直接金属激光烧结技术生产的医用 Co-Cr-Mo 零部件的结构特征分析。
Mater Sci Eng C Mater Biol Appl. 2015 Mar;48:263-9. doi: 10.1016/j.msec.2014.12.009. Epub 2014 Dec 5.