晶粒尺寸对等静压铍材力学性能的影响

来源期刊：中南大学学报(自然科学版)1999年第4期

论文作者：王零森 钟景明 付晓旭 王战宏 聂大钧 王学泽

文章页码：69 - 71

关键词：铍;等静压;力学性能;晶粒尺寸

Key words：beryllium; isostatic press; mechanical property; grain size

摘    要：用冲击研磨方法制备了6种不同粒度 (4～15μm)低氧含量的铍粉，并进行了冷、热等静压成形固结。对材料的抗拉强度、屈服强度、延伸率和微屈服强度的测试结果表明，随晶粒细化，材料强度尤其是屈服强度和微屈服强度得到显著提高；X射线衍射和电镜观察结果表明，细而弥散分布的氧化铍是较高纯度等静压铍材强化的主要原因．

Abstract: Six kinds of beryllium powders with different particle sizes(4～15 μm) and low oxygen prepared by impact grinding were compacted and consolidated by cold hot isostatic pressing (CIP-HIP). The tensile strength, yield strength, elongation and microyield strength(MYS) of these materials were tested. The results show that the strength of the materials, especially the yield strength and MYS are increased obviously with the refinement of grain size. The second phase was BeO which was fine and dispersed in distribution observed by XRD and TEM. It is considered to be the main strengthening mechanism for higher purity CIP-HIP beryllium materials.