热镦压AM Ti64的组织发展

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos230623045s

S. Szczepanik, P. Nikiel

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引用次数: 0

摘要

由于AM - Ti合金通常含有孔隙，对于要求苛刻的应用，必须消除它。HIP有报道，但价格昂贵;EBM Ti6Al4V在900?C被调查。应变速率为0.01-1 s-1。与印刷材料相比，没有检测到孔隙率。从塑性试验中获得了应力-真应变关系，并确定了峰值应力。利用Simufact模拟程序，得到了等效应变和温度的详细分布。并与锻铸和印刷材料进行了比较。根据应变速率和变形的不同，α片的宽度在1.81 ~ 2.34 μ m之间，β片在空气中冷却时形成于片间空间。完全加工后的材料硬度在293-304 HV1之间，与应变速率无关。这将与EBM Ti64 316-360 HV0.3和类似加工的铸锻材料350-365 HV0.3进行比较。

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Microstructure development in warm upset AM Ti64

As AM Ti alloys generally contain porosity, for demanding applications it must be eliminated. HIP was reported, but it is expensive; accordingly forging by upsetting of EBM Ti6Al4V at 900?C was investigated. Strain rates of 0.01-1 s-1 were employed. In contrast to the as-printed material, porosity was not detected. From the plastometric tests the stress-true strain relationships were obtained and peak stresses were determined. Using the Simufact simulation program, details of the distribution of equivalent strains and temperatures were obtained. Comparison with wrought cast and printed materials is reported. The eventual microstructure consisted of alpha lamellae ranging in width from 1.81 to 2.34 ?m, depending on strain rate and deformation, and beta formed in the interlamellar space during cooling in air. The hardness of the fully processed material was in the range of 293-304 HV1, independently of strain rate. This is to be compared with EBM Ti64, 316-360 HV0.3, and similarly processed cast wrought material, 350-365 HV0.3.

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.