构型参数及方式对Al2O3p/高锰钢球形网络复合材料压缩性能的影响

传统的耐磨金属基复合材料普遍存在塑韧性低的问题。对氧化铝颗粒(Al₂O₃p)增强高锰钢复合材料进行球形网络构型设计，研究了构型方式、参数及热处理对复合材料压缩性能的影响。制备了3种构型参数(球径?分别为6 mm、7 mm、8 mm)结合两种构型方式(平行、错落)的Al₂O₃p/高锰钢球形网络复合材料、均匀复合材料和基体材料。结果表明：同构型方式下，随着构型参数(复合区体积分数)的增加，材料的压缩性能降低，其中?6材料的屈服强度、抗压强度和(抗压强度下)应变最佳，相比于均匀复合材料分别提升203.8%、236.1%和134.8%，屈服强度相比于基体材料提升107.5%；同构型参数下，错落排布比平行排布的屈服强度、抗压强度和应变分别提升10.9%、28.5%和16.3%；水韧处理后，错落排布材料的屈服强度降低35.2%，抗压强度提升11.0%，应变提升163.1%。裂纹易在基体区与复合区界面处萌生并进行扩展，基体能够阻碍裂纹的扩展；错落排布增大了复合区的最小间距，提升了塑性。

Influence of architecture parameter and mode on compressive properties of an Al2O3p/high manganese steel spherical interpenetrating composite

Conventional wear-resistant metal matrix composites generally suffer from low plastic toughness. The spherical interpenetrating architecture design of Al₂O₃ ceramic particle (Al₂O₃p) reinforcement high manganese steel composites was carried out, and the effects of the architectured parameters, modes and heat treatment on the compressive properties of the composites were investigated. Al₂O₃p/high manganese steel spherical interpenetrating composites with three architectured parameters (ball diameter φ of 6 mm, 7 mm, 8 mm) combined with two architectured modes (parallel and staggered), uniformly dispersed composite, and matrix materials were prepared. The results show that the compressive properties of the materials decrease with the increase of the architectured parameters (volume fraction of the composite zone) under the same architectured mode, with the best yield strength, compressive strength, and (under compressive strength) strain for φ6 materials, increasing by 203.8%, 236.1%, and 134.8%, respectively compared with the uniform dispersed composites. The yield strength increases by 107.5% compared with the matrix materials. Under the same architectured parameter, the yield strength, compressive strength and strain of staggered-arrany are increased by 10.9%, 28.5%, and 16.3%, respectively, compared with the parallel-arrany. The yield strength is reduced by 35.2%, the compressive strength is increased by 11.0% and the strain is increased by 163.1% for staggered-arrany composites after water toughness treatment. Cracks tend to sprout and expand at the interface between the matrix and composite zones, but the matrix can hinder the crack expansion. Staggered-arrany increases the minimum spacing of the composites zones and enhances plasticity.