scholarly journals STUDI KOMPARASI PENGARUH VARIASI ARUS PENGELASAN TERHADAP KEKUATAN IMPAK, KEKERASAN, DAN STRUKTUR MIKRO SAMBUNGAN LAS PEGAS DAUN BAJA SUP 9 PADA PROSES LAS SMAW

2017 ◽  
Vol 9 (2) ◽  
pp. 57
Author(s):  
Fajar Nugroho
Keyword(s):  
Grain Size ◽  
Impact Strength ◽  
Welding Current ◽  
Hardness Test ◽  
Strength Test ◽  
Leaf Spring ◽  
Micro Structure ◽  
Current Impact ◽  
The Impact ◽  
To Receive

Abstract Spring is a component that functions to receive dynamic load and providescomfort in driving. The problem is the leaf spring is sometimes broken due to theoverload or unfavorable road conditions. The solution for that problem is grafting using the SMAW welding.This study aims to determine the effect of variations in the welding currentto the impact strength, hardness and microstructure. Types of weld used is SMAW with a variety of welding current of 100 A, 120 A and 140 A and the type of seam used is the type of seam V.The highest impact strength test was 1.698 j/mm2at 100 A and the highest hardness test was 355.338 HVN at 140 A. In addition, the micro structure at the welding area has bigger grain size and more pearlite structure at 140 A. Keywords: welding current, impact strength, hardness, micro structure AbstrakPegas adalah suatu komponen yang berfungsi untuk menerima beban dinamis dan memberikan kenyamanan dalam berkendara. Permasalahan yang sering dialami oleh pegas daun adalah patah akibat beban lebih atau kondisi jalan yang kurang baik. Penanganan pada hal seperti ini adalah penyambungan menggunakan las SMAW.Penelitian ini bertujuan untuk mengetahui pengaruh variasi arus pengelasan terhadap kekuatan impak, kekerasan dan Struktur mikro. Jenis las yang digunakan adalah las SMAW. Variasi arus pengelasan yang digunakanadalah 100 A, 120 A dan 140 A. Jenis kampuh yang digunakan adalah jenis kampuh V.Hasil uji kekuatan impak tertinggi diperoleh pada variasi arus 100 A yaitu sebesar 1,698 J/mm2. Hasil uji kekerasan tertinggi diperoleh pada variasi arus 140 A yaitu sebesar 355,338 HVN. Struktur mikro pada daerah las memiliki ukuran butiran yang semakin besar dan struktur perlit yang semakin banyak untuk variasi arus 140 A.Kata kunci: arus pengelasan, kekuatan impak, kekerasan, struktur mikro

scholarly journals KARAKTERISTIK SIFAT MEKANIS ANTARA TIGA PRODUK MANUFAKTUR ELEKTRODA E6013

2019 ◽  
Vol 3 (1) ◽  
pp. 40-45
Author(s):  
Basori Basori ◽  
Ferry Budhi Susetyo
Keyword(s):  
Impact Strength ◽  
Test Specimen ◽  
Impact Test ◽  
Surface Hardness ◽  
Welding Process ◽  
Hardness Test ◽  
Bottom Plate ◽  
Weld Deposit ◽  
Welding Electrode ◽  
The Impact

The type of electrode used in the SMAW process has many types, such as E 6010, E 6011, E 6012, E 6013, E 6020, E6027. In this case the type E 6013 is the most widely used. Certainly the type E 6013 is produced by different manufacturers as well. From penelurusan researchers of this type have different prices in accordance with companies that sell it. For that reason researchers are interested to compare the three manufacturing outputs for the type E 6013 in terms of its mechanical properties. Making a specimen welding electrode cut material to be used. then sandpaper the material that has been cut so that no remaining pieces are still attached. The next step to do the welding process with three types of E6013 elekroda. The welding is carried out until it reaches the layer layer 10 mm thickness, then the bottom plate is discarded and the weld deposit deposits only The impact strength and surface hardness value are inversely proportional. For the impact test, the E1 electrode sample specimen has the highest impact strength value and the E3 electrode sample specimen has the lowest impact strength value. While on the hardness test specimen E3 electrode sample has the highest hardness value and sample specimen E1 electrode has the lowest hardness value. This can prove that the harder the object is the more brittle the object.

Recycled Polypropylene/SEBS Polyblends: Manufacture and Mechanical Property Evaluation

2013 ◽  
Vol 457-458 ◽  
pp. 53-56
Author(s):  
Jia Horng Lin ◽  
Zheng Yan Lin ◽  
Jin Mao Chen ◽  
Ching Wen Lou
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Polarized Light ◽  
Strength Test ◽  
Recycled Polypropylene ◽  
Property Evaluation ◽  
Poly Ethylene ◽  
The Impact ◽  
Test Impact ◽  
Spherulite Morphology

This study polystyrene-b-poly (ethylene-r-butylene)-b-polystyrene (SEBS) elastomer to modify recycled polypropylene (RPP). Tensile strength test, impact strength test, and a polarized light microscope are used to evaluate the mechanical properties and spherulite morphology of the resulting RPP/SEBS polyblends. The experiment results show that with an increase in SEBS, tensile strength of the polyblends decreases from 29 MPa to 13 MPa. With the distribution of SEBS in RPP, the spherulite size of RPP decreases, but the impact strength significantly increases.

HARDNESS MICROSTRUCTURE OF STEEL 20GL OF ELECTRIC ARC MELTS AS AN INDICATOR OF THE IMPACT STRENGTH OF CAR CASTINGS

2021 ◽  
Author(s):  
Роман Александрович Богданов
Keyword(s):  
Grain Size ◽  
Impact Strength ◽  
Alloy Steel ◽  
Microstructural Analysis ◽  
Electric Arc ◽  
Low Alloy Steel ◽  
The Impact

На основе микроструктурного анализа низколегированной стали 20ГЛ актуальное значение приобретает размер зерен феррита и перлита, их твердость, оказывающие воздействие на ударную вязкость вагонных отливок «Рама боковая» и «Балка надрессорная». On the basis of microstructural analysis of low-alloy steel 20GL, the grain size of ferrite and perlite, their hardness, which affect the impact strength of car castings "Side frame" and "Spring beam", are of current importance.

The Estimated Influence of Kholodninskoye Polymetallic Ore Deposit over Water Bodies in the Northern Baikal Region

2018 ◽  
Vol 22 (12) ◽  
pp. 68-73 ◽  
Author(s):  
Е.L. Vorobyevskaya ◽  
S.N. Kirillov ◽  
М.V. Slipenchuk ◽  
N.I. Tulskaya ◽  
А.V. Ustyantsev ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Mine Waters ◽  
The Republic ◽  
High Concentrations ◽  
Current Impact ◽  
Iron Manganese ◽  
The Impact ◽  
Polymetallic Ore ◽  
To Receive ◽  
Surface Water Samples

The possible influence of Kholodninskoe deposits of polymetallic ores is considered. The Deposit is located in Severobaykalsky district of the Republic of Buryatia. It is in the Central ecological zone of lake Baikal. Reclamation work was not carried out after the exploration of the 1980s and at present pollution continues to form: the Deposit is not being developed, but from exploration tunnels continue to receive mine waters with high concentrations of zinc, iron, manganese and other elements. Background monitoring is carried out on the territory of more than 10 years, including conducted a comprehensive expedition to assess the impact of Kholodninskoe deposits on the waters of the Gulf of Angarsky Sor and lake Baikal. The article contains a preliminary assessment of the current impact of the field based on the analysis of surface water samples and sediments

scholarly journals The Improvement of Impact on Manganese Steel for Bucket Tooth Product

2019 ◽  
Author(s):  
Eko Wismo Winarto ◽  
Suryo Darmo ◽  
Nugroho Santoso ◽  
Lilik Dwi Setyana
Keyword(s):  
Grain Size ◽  
Impact Strength ◽  
Induction Furnace ◽  
Mechanical Tests ◽  
Manganese Steel ◽  
Austenite Stability ◽  
Microstructure Observation ◽  
Average Grain Size ◽  
The Right ◽  
The Impact

The bucket tooth is one of an excavator components made of manganese steel used to dig and load land into a truck or elsewhere. The impact of the bucket tooth product needs to be increased so that it has longer lifetime. The objective of this research is to know the right composition of manganese in order to obtain the optimal impact strength. Varying the composition of manganese from 11,2% to 15,1% wt Mn are carried out in an induction furnace. Mechanical tests carried out include microstructure observation, impact and hardness testing. The structure of austenite dominates manganese steel with an average grain size of 60 μm (11,2% Mn) and increases up to 45% for the contents of 15,1% Mn. The lowest impact strength (0,08 J/mm2) in specimens with 11,2% Mn, increases up to 42% (0,142 J/mm2) in specimens with 15,1% Mn. The increase of impact strength is affected by grain size and austenite stability. The hardness of manganese steel with 11,2% Mn (330 VHN) increases up to 376 VHN with 15,1% Mn.

scholarly journals Pengaruh Kuat Arus Dan Besar Sudut Kampuh Terhadap Kekuatan Impact Dan Nilai Kekerasan Plat Baja Karbon Rendah Dengan Menggunakan Las SMAW

2020 ◽  
Vol 3 (2) ◽  
pp. 53
Author(s):  
Soleh Abdul Aziz
Keyword(s):  
Impact Strength ◽  
Experimental Method ◽  
Welding Current ◽  
Electric Arcs ◽  
Welding Seam ◽  
The Impact

Abstract: Welding is welding that utilizes flame heat in electric arcs to melt electrodes and workpieces. SMAW welding is widely used because of its relatively easy to use, cost-friendly and maximum quality results. In conducting welding has several factors that will affect the quality of the welding results such as a welder, welding current and metal distance and welding seam angle. This study aims to determine whether there is an influence of current variations and magnitude of the seam angle to the value of the impact strength and the hardness value of the SMAW welding results. This study uses a pre-experimental method with a one-shot case model. The results of this study indicate the highest impact strength values of current variations in the 80 Ampere specimen at the angle of seam V 60o in the amount of 0.0799 J / mm2 and in the 80 Ampere specimen in the angle of the 80o V in the seam angle of 0.0942 J / mm2. Then for the highest impact strength value variation of seam angle V group of seam angle specimen V 80o current 80 Amperes is equal to 0.0942 J / mm2 and specimen angle of seam V 80o current 100 Ampere 0.0824 J / mm2. The highest hardness value is obtained with a variation of the current specimen group of 100 Ampere in the angle of seam V 60o that is equal to 187.1 HVN and in the specimen group 100 Ampere with the angle of contact V 80o that is equal to 204.4 HVN. Then the highest hardness value variation angle seam V specimen V 80o with current 80 Amperes is equal to 191.63 HVN and specimen angle of seam V 80o with 100 amperes current that is equal to 204.4 HVN. KeyWords : SMAW, Welding current, V groove, Impact Strength, Hardness

ENHANCEMENT OF DENTURE-BASED MATERIAL PMMA BY INCORPORATION OF SILANIZED HALLOYSITE NANOTUBES

2021 ◽  
Vol 74 (9) ◽  
pp. 2293-2296
Author(s):  
Rafah Habib Abdul Amir
Keyword(s):  
Impact Strength ◽  
Base Material ◽  
Hardness Test ◽  
Acrylic Resin ◽  
Halloysite Nanotubes ◽  
Control Group ◽  
Transverse Strength ◽  
Comparison Results ◽  
Significant Difference ◽  
The Impact

The aim: This study evaluates the effect of adding silanized halloysite nanotubes to the polymethylmethacrylate (PMMA) resin on its hardness, impact strength, transverse strength. Materials and methods: Three groups of acrylic resin were prepared, one group without HNTs, was used as a control group (A). The other two groups contained 0.3% (B), 0.6% wt of silanized halloysite nanotubes (C). For each one, hardness, impact strength and transverse strength were measured. One-way ANOVA and Tukey’s test were used for comparison. Results: Regarding to the impact test, there was no significant difference between 0.3% concentration and the pure (control) group while 0.6% concentration had significant decrease compared to the pure group and so between the 0.3% group 0.6% group. For the hardness test, the 0.3% group had no significant difference with the pure group and a significant difference between group 0.6% group and the pure group while there was a no significant decrease between the 0.3% and 0.6% group with the higher hardness mean in the 0.3% compared to 0.6% group. For the transverse strength, both 0.3% wt concentration and 0.6% concentration showed significant difference compared to the pure group and also between each other with the lowest impact strength in 0.6% group followed by 0.3% group with the highest transverse strength in the pure group. Conclusions: The silanation of halloysite nanotubes reduces the mechanical properties of the heat-cured acrylic denture base material. The more concentration of silanazed halloysite nanotubes is added, the more weakening occurs in the acrylic material relating to the hardness, transverse strength and impact strength.

Effect of Welding Consumables on Dissimilar AISI304/AISI1015 Steels Butt Joint Properties

2018 ◽  
Vol 777 ◽  
pp. 344-349
Author(s):  
Surat Triwanapong ◽  
Kittipong Kimapong
Keyword(s):  
Impact Strength ◽  
Weld Metal ◽  
Welding Current ◽  
Interface Structure ◽  
Butt Joint ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Joint Properties ◽  
Covered Electrodes ◽  
The Impact

The butt joint of dissimilar AISI304/AISI1015 steels was produced by a Shielded Metal Arc Welding (SMAW) with 3 types of the covered electrodes and the welding current of 80-120 A. The investigation of joint properties for the impact strength, the hardness, and the microstructure, was performed. The SMAW butt joint that was welded by the E312 covered electrode and 100A welding current showed the highest impact strength of 112 J. The chromium was the important reinforced element affected to increase in the hardness and the impact strength of the joint by forming and dispersing the chromium carbide in the weld metals. Interface structure of the carbon steel/the weld metal clearly showed a small combined area of the metals in opposition to the interface structure of the stainless steel/ the weld metal which had a large combined area of the metals.

scholarly journals Effect of the Simulated Disinfection by Microwave Energy on the Impact Strength of the Tooth/Acrylic Resin Adhesion

2008 ◽  
Vol 2 (1) ◽  
pp. 13-17 ◽  
Author(s):  
Rafael L.X. Consani ◽  
Marcelo F. Mesquita ◽  
Marinaldo H. Zampieri ◽  
Wilson B. Mendes ◽  
Simonides Consani
Keyword(s):  
Impact Strength ◽  
Impact Load ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Fracture Load ◽  
Strength Test ◽  
Microwave Oven ◽  
Treatment Control ◽  
Molar Teeth ◽  
The Impact

The objective of this study was to determine the effect of simulated microwave disinfection on the tooth/acrylic resin impact strength. Acrylic molar teeth with a wax stick attached to the ridge lap were included in brass flasks. Specimens were made with Classico thermopolymerized acrylic resin, according to the groups: 1 and 5 - tooth with no treatment (control); 2 and 6 – tooth bur abrasion; 3 and 7 – tooth bur retention; and 4 and 8 – tooth monomer etch. Eighty specimens (n=10) were polymerized in bath cycle at 74ºC for 9 hours and deflasked after flask cooling. Specimen from groups 2, 4, 6 and 8 was submitted to simulated microwave disinfection in a microwave oven at 650W for 3 minutes. Impact strength test was performed with an Otto Wolpert-Werke machine (Charpy system) with an impact load of 40 kpcm. Fracture load value was transformed into impact strength as a function of the bond area (kfg/cm2). Collected data were submitted to ANOVA and Tukey’s test (α=.05) and results indicate that the simulated microwave disinfection decreased the impact strength in all treatments.

Manufacturing Technique and Property Evaluation of Impact-Resistant Polypropylene/Glass Fiber Composites

2011 ◽  
Vol 239-242 ◽  
pp. 1976-1979 ◽  
Author(s):  
Ching Wen Lou ◽  
Ching Wen Lin ◽  
Wen Hao Hsing ◽  
Jin Mao Chen ◽  
Cheng Yu Ke ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Glass Fibers ◽  
Stress Test ◽  
Weight Ratio ◽  
Strength Test ◽  
Flexural Stress ◽  
Molding Method ◽  
Izod Impact ◽  
The Impact

Using the injection molding method, impact-resistant polypropylene (PP) and glass fibers (GF) with weight ratios of 5 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt% and 30 wt% were blended twice, completing high-impact PP/ GF composites. Next, the tensile strength test, flexural stress test and IZOD impact strength test measured the composites. According to the results, with an increase in glass fibers, the composites exhibited a greater tensile strength, which further reached to climax when the GF weight ratio was 25 wt%. However, tensile strength appeared inversely proportionate to the blending frequency. In addition, regardless of blending frequencies, the optimum flexural stress occurred when the GF weight ratio was 25 wt%; nevertheless, it started declining when the ratio was 30 wt%. Finally, indicated by IZOD impact test, the greater the GF weight ratio, the lower the impact strength the composites exited.

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