期刊论文

Construction and application of SP prediction model of aluminum alloy via BBD method

Liao, K.

中文

材料热处理学报

1009-6264

2019

40

4

150-157

10.13289/j.issn.1009-6264.2018-0529

国家自然科学基金(51475483) 湖南省重点研发计划(2018NK2065,2016NK2142) 湖南省高校科技创新团队支持计划项目(2014207).

本校为第一且通讯机构

研究了喷丸强化工艺对7075铝合金工件表面性能的影响,获得了材料表面应力、硬度特征和喷丸工艺参数之间的对应关系。通过Box-Behnken design(BBD)方法设计喷丸实验,研究了颗粒尺寸、空气压力、喷丸时间和距离等4个喷丸工艺参数对试样表面性能的影响,采用X射线衍射分析仪与表面显微硬度仪分析了试样表面硬度与应力的分布规律。在对喷丸处理数据进行归纳分析后,构建了喷丸工艺下表面应力与硬度的预测函数,该函数在给定的预期应力与硬度值前提下,可获得喷丸工艺参数组,以此进行实验和计算结果对比,并最后验证预测函数的可靠性。预测函数与实验结果对比表明:在给定一个预期-304 MPa表面应力时,函数给...

The effect of shot peening on surface properties of 7075 aluminum alloy workpiece was studied. The relationship between the surface stress and hardness of the alloy and the shot peening parameters was obtained. The effects of four shot peening parameters, such as particle size, air pressure, shot peening time and distance, on the surface properties of the 7075 aluminum alloy samples were studied by means of the Box-Behnken design (BBD) method. The distribution of surface hardness and stress of the samples was analyzed by means of X-ray diffract...