挤压热压铝431粉末。机械性能和显微组织

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

Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos2301115s

S. Szczepanik, P. Nikiel

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引用次数: 0

摘要

在450度挤压?热压预混铝合金粉末7075经T6热处理后，C为致密带状组织，平均横向晶粒尺寸为13.6 μ m。拉伸应力和屈服应力分别达到457 MPa和492 MPa，伸长率达到6.4%。这些符合ASTM标准ASM对类似化学成分的7075T6常规制造合金的要求。并与未热处理的全致密7075 Al的组织进行了比较，后者具有较低的力学性能，屈服应力和拉伸应力分别为254和402 MPa，伸长率为10.4%。

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Extruded hot compacted alumix 431 powder - mechanical properties and microstructure

Extrusion at 450?C of hot compacted premixed aluminium alloy powder 7075 resulted in full density and banded microstructure with the average transverse grain size of 13.6 ?m after T6 heat treatment. It increased mechanical properties to yield and tensile stresses of 457 and 492 MPa, respectively and elongation 6.4 %. These meet the requirements of the ASTM standard ASM for 7075T6 conventionally manufactured alloy of similar chemical composition. The respective microstructures were compared and also to that of previously reported extruded fully dense 7075 Al which was not heat treated, and so possessed lower mechanical properties, yield and tensile stresses 254 and 402 MPa, respectively and elongation 10.4 %.

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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.