文章基本信息

标题：Influences of the Air in Metal Powder High Velocity Compaction
本地全文：下载
作者：Jun Liu ; Jun Liu ; Haifeng Hu 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2017
卷号：95
页码：1-4
DOI：10.1051/matecconf/20179502001
语种：English
出版社：EDP Sciences
摘要：During the process of metal powder high velocity impact compaction, the air is compressed sharply and portion remains in the compacts. In order to study the Influences, a discrete density volleyball accumulation model for aluminium powder was established with the use of ABAQUS. Study found that the powder porosity air obstruct the pressing process because remaining air reduced strength and density of the compacts in the current high-speed pressing (V≤100m/s). When speed further increased (V≥100m/s), the temperature of the air increased sharply, and was even much higher than the melting point of the material. When aluminium powder was compressed at a speed of 200m/s, temperatures of air could reach 2033 K, far higher than the melting point of 877 K. Increased density of powders was a result of local softening and even melt adhesive while air between particles with high temperature and pressure flowed past.