Penelitian ini bertujuan untuk mengetahui pengaruh bentuk pin yang berbeda terhadap sifat mekanik dan struktur mikro hasil lasan menggunakan proses pengelasan aduk gesek. Proses las aduk gesek dengan cara tool berputar melakukan penetrasi ke benda kerja dan gesekan akan melunakkan material. Sambungan terbentuk akibat bersatunya logam lunak pada kedua sisi dengan adanya tekanan tool. Proses las aduk gesek aluminium 5083 -H112 menggunakan mesin frais dan tool dengan bentuk pin tirus beralur, silinder beralur dan segitiga beralur dengan parameter putaran tool 1500 rpm, kecepatan pengelasan 29 mm/min, sudut kemiringan tool 0 o dan kedalaman pembenaman pin 4,8 mm menunjukkan proses berlangsung dengan baik. Hasil pengujian mekanik menunjukkan nilai kekerasan sebesar 85 HV dan harga impak rata -rata di sambungan las sebesar 0,24 J/mm 2 menggunakan pin tirus beralur lebih tinggi dibandingkan dengan menggunakan pin silinder beralur dan segitiga beralur. Kekuatan tarik tertinggi menggunakan pin tirus beralur sebesar 172 MPa masih lebih rendah dari kekuatan tarik logam induk sebesar 331 MPa karena adanya cacat pada hasil lasan. Pengamatan struktur mikro menunjukkan butir menjadi lebih halus di daerah daerah adukan dibandingkan daerah Thermomechanically Affected Zone, Heat Affected Zone dan logam induk. Proses pengelasan aduk gesek aluminium 5083 -H112 menggunakan tool dengan pin tirus beralur menghasilkan sifat mekanik dan struktur mikro yang lebih baik daripada menggunakan pin silinder beralur atau segitiga beralur.Kata kunci : kondisi padat, las aduk gesek, frais, pin, daerah adukan ABSTRACT Friction Stir Welding process, which is a solid state welding tool utilizing friction with the workpiece to soften the material is spliced into a choice in aluminum welding. Selection of the proper tool will produce welds with excellent mechanical properties. The research objective is to determine the effect of different forms of pins on mechanical properties and microstructure joint of the friction stir welding process. Friction stir welding process by means of a rotating tool to penetrate into the work piece and friction will soften the material. The connection formed by the merging of soft metal on both sides with a pressure tool. The process of friction stir welding aluminum 5083 -H112 using milling machines and tool with a tapered pin grooves, a cylinder pin grooves or a triangular pin groove and using 1500 rpm tool rotation , the welding speed of 29 mm/min, 0° tool tilt angle, and the depth of plunge 4.8 mm indicate the process is going well . Mechanical testing indicates hardness value using is 85 HV and impact value is 0.24 J / mm 2 using a tapered pin groove higher than the cylindrical pin groove and a triangular pin groove. The highest tensile strength used a tapered pin groove of 172 MPa is still lower than the base metal tensile strength of 331 MPa because there was defect in the weldment. Microstructure observation showed changes into a finer grain in the weld nugget compared Thermomechanically area Affected Zone, Heat A...

The results concluded that the criterias of fast food that is halal and which is haram in Islamic Shari'ah is determined by the presence or absence of unclean and unclean goods elements. MUI has arranged halal fast food products by establishing the System and Procedures for Stipulation of Fatwa Halal Products completely. LPPOM MUI has also set up MUI Halal Certification procedures in detail for fast-food restaurant products. National fast food restaurants in Bogor City have been certified halal MUI and have implemented Halal Assurance System (SJH). This is evidenced by the establishment of halal policy by Top Management; appointment of Halal Management Team; making HAS manual; implementation of Halal Assurance System training; preparation of HAS related procedures; internal audit implementation; and management review. The local fast food restaurants are generally not certified halal MUI, so it cannot be ascertained halal. Because to ensure it must go through an audit process that requires fast-food restaurant companies to register halal certification first. Therefore, the authors suggest that the government immediately implement the mandate of Halal Product Guarantee Act (JPH) by making the government regulation as derivative rule and complementing the working tool of the Halal Product Guarantee Organizer (BPJPH). In addition, fast-food restaurant entrepreneurs who have not been certified halal to immediately apply halal certification, in order to protect the interests of consumers of food products containing elements of illicit goods or impure. The people, especially the Muslims, are encouraged to consume halal certified halal food products, and be wary of processed food products that have not been certified halal, especially products that have a critical point on raw materials, additives, and auxiliary materials as well as on the production process.