A comparative study of material phase effects on micro-machinability of multiphase materials
A comparative study of material phase effects on micro-machinability of multiphase materials
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DOI：
10.1007/s00170-009-2506-9
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发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
A. Mian;Nicholas Driver;P. Mativenga
中科院分区：
文献类型：
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作者：
A. Mian;Nicholas Driver;P. Mativenga
在多相材料的机械微加工中，切割过程是在长度尺度上进行的，其中必须考虑材料的异质性。这导致了越来越多的兴趣，优化工艺参数的微加工这种材料。在这项研究中，两种钢，主要是铁素体材料（AISI 1005）和近平衡的铁素体/珠光体显微组织（AISI 1045）的微切削性能进行了研究。工件样品的变形性能的特点是纳米压痕测试。此外，对工件显微组织进行金相晶粒度评估。在一定的进给速度范围内，对微加工零件的表面粗糙度、工件微观结构和毛刺尺寸以及刀具磨损进行了研究。结果表明，对于微加工零件，相之间的差异弹性恢复导致更高的表面粗糙度时，微加工的多相材料的表面质量相比，单相材料。另一方面，对于单相主要为铁素体的材料，减少毛刺尺寸和刀具磨损是主要挑战。阐述了材料特性对微铣削加工表面质量和工件边缘质量的影响。
In the mechanical micro-machining of multiphase materials, the cutting process is undertaken at a length scale where material heterogeneity has to be considered. This has led to increasing interest in optimising the process parameters for micro-machining of such materials. In this study the micro-machinability of two steels, a predominantly ferrite material (AISI 1005) and a near-balanced ferrite/pearlite microstructure (AISI 1045) was studied. Workpiece sample deformation properties were characterised by nano-indentation testing. Additionally, metallographic grain size evaluation was undertaken for the workpiece microstructures. Surface roughness, workpiece microstructure and burr size for micro-machined parts as well as tool wear were examined over a range of feed rates. The results suggest that for micro-machined parts, differential elastic recovery between phases leads to higher surface roughness when the surface quality of micro-machined multiphase phase material is compared to that of single phase material. On the other hand, for single phase predominantly ferritic materials, reducing burr size and tool wear are major challenges. Thus, the paper elucidates on material property effects on surface and workpiece edge quality during micro-milling.