ABSTRAK
Perkembangan teknologi berukuran mikro meningkat drastis pada beberapa tahunterakhir, terutama dalam bidang biomedical engineering, micro-electro mechanical,dan aerospace engineering. Micromilling merupakan salah satu metode prosesmanufaktur komponen berukuran mikro. Teknologi micromilling memiliki manfaatbesar bagi pengembangan teknologi berskala micro karena proses pengerjaan yangrelatif mudah, tingkat kepresisian yang tinggi, serta dapat memperoleh hasil yangbaik secara umum. Namun aplikasi micromilling dalam dunia industri masih sangatminim, hal ini disebabkan karena proses pengerjaan yang dapat dikatakan belumefisien. Pada penelitian ini, material yang digunakan merupakan paduan logamdengan seri Al6061 dan dibandingkan dengan material Steel SAE 304. PermodelanCAD dan CAM dilakukan dengan menggunakan perangkat lunak Siemens NX.Permodelan dilakukan untuk mendapatkan CL files yang berisikan koordinat jalurtool (biasa dikenal dengan sebutan NC files). Proses pemesinan dilakukan denganhighspeed micromilling 5 axis, dengan cutting tool berdiameter 0.2 mm. Proseseksperimen berupa pemotongan material pada 8 jalur seperti arah mata angin. Hasildidapatkan berupa nilai average surface roughness (Ra) pada setiap jalur dangambar scanning electron microscope untuk melihat permukaan setiap jalur.Melalui nilai surface roughness dan gambar permukaan dari setiap jalur, dianalisahubungan antara hasil dan mikrostruktur material yang didapatkan daritransmission electron microscopy.

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ABSTRACT
The growth of micro technology has increased dramatically in recent years,particulary in the fields of biomedical engineering, micro-electro mechanical, andaerospace engineering. Micromilling is a method of many manufacturing processesof micro-sized products. Micromilling technology has a lot of benefits for thedevelopment of micro-scale technology considering the process is relatively easy,high level of precision, and can obtain good result in general. However,micromilling applications in the industrial world are very low. It is becausemicromilling process is considered not efficient. In this research, the materials usedare metal alloys consist of Al6061 and steel series SAE 304 as comparison. CADand CAM modeling are using Siemens NX software. Modeling performed to obtainthe CL files which contain a list of tool path coordinates (commonly known as NCfiles). Manufacturing processes are carried out with 5 axis highspeed micromillingand cutting tool diameter of 0.2 mm. Experiment process consists of feedingmaterials, resulting 8 channels consist of cardinal and ordinal directions on eachsample. Average surface roughness (Ra) and scanning electron microscope imagesof each channel are obtained as the results of experiment and then investigated toanalyze the correlations between microstucture of material obtained fromtransmission electron microscopy.