首页> 中文期刊> 《中国有色金属学报(英文版)》 >Taguchi统计学分析方法优化Al 7068-TiC纳米复合材料的凝固行为

Taguchi统计学分析方法优化Al 7068-TiC纳米复合材料的凝固行为

         

摘要

The fabrication of high strength Al 7068−5%TiC (mass fraction) nanocomposite was studied by mechanical alloying and hot pressing routes. Considering densification importance and grain growth effects, hot pressing process conditions for producing bulk nanocomposite were optimized using statistical Taguchi method based on compressive strength achievement. The Taguchi results indicate that 30 min hot pressing under pressure of 500 MPa at 385 °C provides high compressive strength and hardness of 938 MPa and HV 265, respectively. More interestingly, analysis of variance proves that the applied pressure is the most influential factor for hot pressing of the nanocomposite. The contribution percentages of factors in hot pressing terms are as follows: applied pressure (61.3%), exposed temperature (29.53%) and dwelling hot pressing time (4.49%).%采用机械合金化和热压工艺制备高强Al 7068−5%TiC(质量分数)纳米复合材料。基于致密化的重要性和晶粒生长的影响,以获得较高抗压强度为目标,采用Taguchi统计法对制备Al 7068−5%TiC块体纳米复合材料的热压条件进行优化。结果表明:在500 MPa和385°C下热压30 min能获得抗压强度为938 MPa、硬度为HV 265的Al 7068−TiC纳米复合材料。此外,方差分析结果表明,外加压力是影响纳米复合材料热压过程最关键的因素。各因素对纳米复合材料热压过程影响贡献率为外加压力(61.3%)、热压温度(29.53%)和热压时间(4.49%)。

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