scholarly journals Kekuatan Tarik Paduan Al 2024-T3 Dan Al 2524-T3 Yang Telah Mengalami Proses Stretching, Chemical Milling Dan Shot Peening

2020 ◽  
Vol 5 (2) ◽  
pp. 129-133
Author(s):  
Yovial Mahyoedin ◽  
Jamasri Jamasri ◽  
Wenny Marthiana ◽  
Duskiardi Duskiardi ◽  
Rizky Arman
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Yield Stress ◽  
Shot Peening ◽  
Milling Process ◽  
The Other ◽  
Other Hand ◽  
Chemical Milling ◽  
Stretching Process ◽  
Al 2024

AbstrakPenelitian ini bertujuan untuk mengetahui perilaku uji tarik produk Al 2524-T3 dan Al 2024-T3 yang mengalami proses peregangan, chemical milling dan shot peening. Paduan ini diregangkan melebihi tegangan yeildnya masing-masing 1%, 3% dan 5%, kemudian dilakukan proses chemical milling satu sisi. Etsa yang digunakan dalam proses milling kimia adalah larutan NaOH + Na2S + H2O dengan konsentrasi tertentu. Pada permukaan dilakukan proses shot peening dengan variasi intensitas masing-masing 0,03 A, 0,05 A dan 0,07 A. Material tersebut kemudian diuji sifat mekaniknya dengan uji tarik. Hasil penelitian menunjukkan bahwa tegangan ultimate dan tegangan yield material meningkat dengan meningkatnya persentase regangan. Namun, perpanjangan juga meningkat yang menunjukkan bahwa proses peregangan justru meningkatkan keuletan. Di sisi lain, proses shot peening menurunkan elongasi yang mengindikasikan bahwa proses shot peening menyebabkan penurunan keuletan material. Kata kunci: pengujian tarik, chemical milling, shot peening, stretchingAbstractThis study aims to investigate the tensile test behaviour of Al 2524-T3 and Al 2024-T3 product, which undergoes stretching, chemical milling and shot peening processes. These alloys were stretched beyond yield stress, namely 1%, 3% and 5% of each, and then performed chemical milling process of one side. The etching used in chemical milling process were NaOH+Na2S+H2O solutions with certain concentration. The surface was performed shot peening process with varying intensity of 0.03 A, 0.05 A and 0.07 A respectively. The material then tested its mechanical properties by tensile test. The results show that ultimate and yield stress of material increases with the increase of stretching percentage. However, the elongation has also increased which indicates that stretching process actually increases the ductility. On the other hand, the shot peening process decreases the elongation which indicates that the shot peening process causes a reduction in the ductility of the material.  Keywords: tensile tes, chemical milling, shot peening, stretching

scholarly journals Pengaruh Shot Peening Terhadap Kekerasan Dan Kekasaran Produk Chemical Milling Paduan Aluminium Yang Telah Di Stretching

2020 ◽  
Vol 5 (1) ◽  
pp. 36-41
Author(s):  
Yovial Mahyoedin ◽  
Jamasri Jamasri ◽  
Rizky Arman ◽  
Wenny Marthiana ◽  
Suryadima Suryadima
Keyword(s):  
Surface Roughness ◽  
Yield Stress ◽  
Shot Peening ◽  
Milling Process ◽  
Chemical Milling ◽  
Al 2024

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh shot peening terhadap kekasaran permukaan produk pembuatan kimia Al 2524-T3 dan Al 2024-T3 yang telah diregangkan. Paduan ini direntangkan melampaui tegangan luluh, yaitu masing-masing 1%, 3% dan 5%, dan kemudian dilakukan proses penggilingan kimia di satu sisi. Etching yang digunakan dalam proses penggilingan kimia adalah larutan NaOH + Na2S + H2O dengan konsentrasi tertentu. Permukaan dilakukan proses shot peening dengan intensitas yang bervariasi masing-masing 0,03 A, 0,05 A dan 0,07 A. Bahan itu kemudian diuji kekasaran permukaan dan kekerasannya. Hasil penelitian menunjukkan bahwa kekasaran permukaan dan kekerasan material meningkat dengan meningkatnya intensitas peening. Namun, ketebalan Al 2524-T3, yang lebih tipis dari Al 2024-T3 menyebabkan tidak signifikannya proses peening shot yang diberikan pada material.. Kata kunci: Shot Peening, Chemical Milling, Kekerasan, Kekasaran Permukaan AbstractThis study aims to investigate the influence of shot peening on hardness and surface roughness of chemical mlling product Al 2524-T3 and Al 2024-T3 which have been stretched. These alloys were stretched beyond yield stress, namely 1%, 3% and 5% of each, and then performed chemical milling process of one side. The etching used in chemical milling process were NaOH+Na2S+H2O solutions with certain concentration. The surface was performed shot peening process with varying intensity of 0.03 A, 0.05 A and 0.07 A respectively. The material were then tested its surface roughness and hardness. The results show that surface roughness and hardness of material increases with the increase of peening intensity. However, the thickness of Al 2524–T3, which is thinner than Al 2024-T3 causing insignificance of the shot peening process given to the materials. Keywords: Shot Peening, Chemical Milling, Hardness, Surface Roughness

Strength and Ductility of Ni3Al Alloyed with Boron and Substitutional Elements

1994 ◽  
Vol 364 ◽  
Author(s):  
K. Ishikawa ◽  
K. Aoki ◽  
T. Masumoto
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Tensile Test ◽  
Fracture Strength ◽  
Room Temperature ◽  
The Other ◽  
Other Hand ◽  
Strength And Ductility

AbstractThe effect of simultaneous alloying of boron (B) and the substitutional elements M on mechanical properties of Ni3Al was investigated by the tensile test at room temperature. The yield strength of Ni3Al+B increases by alloying with M except for Fe and Ga. In particular, it increases by alloying with Hf, Nb, W, Ta, Pd and Si. The fracture strength of Ni3Al+B increases by alloying with Pd, Ga, Si and Hf, but decreases with the other elements. Elongation of Ni3Al+B increases by alloying with Ga, Fe and Pd, but decreases with other elements. Hf and Pd is the effective element for the increase of the yield strength and the fracture strength of Ni3Al+B, respectively. Alloying with Hf leads to the increases of the yield strength and the fracture strength of Ni3Al+B, but to the lowering of elongation. On the other hand, alloying with Pd improves all mechanical properties, i.e. the yield strength, the fracture strength and elongation. On the contrary, alloying with Ti, V and Co leads to the lowering of mechanical properties of Ni3Al+B. The reason why ductility of Ni3Al+B is reduced by alloying with some elements M is discussed.

Morphology and mechanical properties of transcrystalline isotactic polypropylene

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Koh-hei Nitta ◽  
Yoshikazu Yamamoto
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Mechanical Energy ◽  
Supermolecular Structure ◽  
The Other ◽  
Morphological Properties ◽  
Spherulitic Morphology ◽  
Other Hand ◽  
Morphology And Mechanical Properties ◽  
Yielding Process

Abstract We examined mechanical and morphological properties of fully transcrystalline polypropylene grown from the surface of poly(tetrafluoroethylene) sheets. Comparison of mechanical properties between transcrystalline and spherulitic polypropylenes demonstrated that Young’s modulus is dependent on the crystallinity and independent of the supermolecular structure. On the other hand, the mechanical yielding process was predominantly affected by the supermolecular structure, and the mechanical energy required for yielding of transcrystalline sheets was greater than that of the spherulitic morphology. In addition, it was found that mechanical necking is required for the alignment of lamellae in the stretching direction. This means that the unfolding process of lamellae orienting in the stretching direction is associated with necking and ductility.

Phenomena of the Mechanical Deformation of Rubber

1931 ◽  
Vol 4 (1) ◽  
pp. 54-63
Author(s):  
H. Mark ◽  
E. Valko
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Mechanical Deformation ◽  
The Other ◽  
Considerable Progress ◽  
Organic Substances ◽  
Normal Position ◽  
Regular Lattice ◽  
Other Hand ◽  
Crystalline System

Abstract It is only during recent years that it has become possible by the use of new technic to detect molecular phenomena produced in the mechanical deformation of substances. As far as metallic substances are concerned, and crystalline substances in particular, the problem has already been solved for the most part. On the other hand, in spite of considerable progress during recent years the study of the deformation of organic substances and of fibers in particular, in which group rubber is included, has not yet been carried on. The mechanical properties of a crystalline system vary according to whether there is a single crystal or an aggregate of crystals. However, in both cases the extensibility of the products originates in a displacement of parallel layers, i. e., a sliding of the parts of the crystal along definite crystalline planes, this phenomenon of sliding being irreversible in these substances. In fact, in these cases the reversible part of the elongation is very weak, and amounts to only a few thousandths of the entire phenomenon. In brief, the phenomena of hardening brought about by deformation (sometimes observable) are due to disturbances of the regular lattice. In particular, the displacement of the atom and the change from its normal position can cause the appearance of irregularities on the surface of sliding.

About the Static Mechanical Properties of Epoxy/Hemp Composites

2020 ◽  
Vol 896 ◽  
pp. 321-326
Author(s):  
Cosmin Mihai Miriţoiu ◽  
Nicolae Craciunoiu ◽  
Alexandru Bolcu ◽  
Ionuţ Daniel Geonea ◽  
Ionica Valeriu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Standard Deviation ◽  
Tensile Test ◽  
Yield Stress ◽  
Mechanical Characteristics ◽  
Breaking Strength ◽  
Young Modulus ◽  
Breaking Elongation ◽  
Static Mechanical ◽  
Static Mechanical Properties

In this paper, static mechanical characteristics for some epoxy/hemp composites are studied. By using the tensile test, the static mechanical characteristics are determined, such as: breaking strength, yield stress, Young modulus and breaking elongation. There is also determined the standard deviation. Then, by using some known theories, there is validated the static Young modulus.

Effect of Weld Side Combination on Mechanical Properties of Double Sided Friction Stir Welded 5083 Aluminum Alloy

2014 ◽  
Vol 699 ◽  
pp. 169-174
Author(s):  
Achmad Zubaydi ◽  
Nurul Muhayat ◽  
Budie Santosa ◽  
Dony Setyawan
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Welded Joints ◽  
Welding Process ◽  
The Other ◽  
Butt Welds ◽  
Friction Stir ◽  
Other Hand ◽  
5083 Aluminum Alloy

Double sided friction stir butt welds on 6 mm thick of 5083 aluminum alloy were produced. Two variants of the weld side combination, different weld side (DS) and same weld side (SS), have been made to investigate the effect of the weld side on mechanical properties.The SS is a double sided welding process that produces advancing side in one plate and retreating side in the other one. On the other hand, the DS is a double sided welding process that causes advancing side and retreating side in each plate. Tensile properties of the joints were evaluated and correlated with macrostructure and hardness. The weld side influenced the macrostructure and mechanical properties of welded joints. The different weld side (DS) had better mechanical properties than the same weld side (SS).

Review on the Effect of Bottom Ash in Performance of Portland Cement Mortar

2015 ◽  
Vol 815 ◽  
pp. 164-169
Author(s):  
Ng Hooi Jun ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Husin ◽  
Soo Jin Tan ◽  
Mohd Firdaus Omar
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Mechanical Performance ◽  
Cement Mortar ◽  
Bottom Ash ◽  
The Other ◽  
Other Hand

Utilization and suitability of bottom ash in Portland cement have been increasing significantly in recent year. Bottom ash has substantial effects on mechanical properties with different composition of replacement in mixture of bottom ash and Portland cement. Bottom ash was used to determine the feasibility of the substitution as recycling product from industry depending on the percentage of the bottom ash. On the other hand, bottom ash offers a better solution for maintaining materials characteristic of Portland cement mortar and also provide beneficial mechanical performance. The result of using bottom ash in Portland cement mortar showed that it could make better the mechanical properties and hence disposed bottom ash wastes safely in technical, economic and environmental methods.

scholarly journals STUDY ON THE CLARIFYING ADDITIVES FOR HIGH DENSITY POLYETHYLENE

2018 ◽  
Vol 56 (2A) ◽  
pp. 63-68
Author(s):  
Le Thi Bang
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
High Density Polyethylene ◽  
High Density ◽  
The Other ◽  
Other Hand ◽  
Thermal Mechanical Properties ◽  
Cost Of Production ◽  
The Cost

Bis-3,4- dimethyldibenzylidene sorbitol (DMDBS); bis-p-methylbenzylidene sorbitol (MDBS) and the mixture of DMDBS/MDBS (50/50) were studied through optical, thermal, mechanical properties and surface morphology. With the same amount of additive (DMDBS/MDBS mixture and DMDBS) in the material, the results are similar. On the other hand, using an additive mix reduces the cost of production due to MDBS. Furthermore, the additive mixture is used without producing odours. Therefore, the mixture of DMDBS/MDBS (50/50) is chosen.

Influence of Nano-SiO2 and Nano-CaCO3 on the Mechanical Properties of Concrete with Different Strength Grades

2011 ◽  
Vol 250-253 ◽  
pp. 480-484 ◽  
Author(s):  
Miao Zhou Huang ◽  
Tao Meng ◽  
Xiao Qian Qian ◽  
Jin Jian Zhang
Keyword(s):  
Mechanical Properties ◽  
The Other ◽  
Early Age ◽  
Nano Materials ◽  
Strength Grade ◽  
Other Hand

The flow ability, mechanical properties and microstructure of concrete with different strength grades affected by nano-SiO2and nano-CaCO3was studied. The experiment results showed that the strength of concrete at early age was increased by adding the nano-materials if the strength grade of concrete was not high. But the strength at the age of 28 days was not affected a lot by adding these nano-materials. On the other hand, it was not useful to the strength if the strength grade of concrete was high.

scholarly journals Observations on the blood-corpuscles, particularly with reference to opinions expressed and conclusions drawn in papers ‘on the corpuscles of the blood,’ and ‘on fibre,’ recently published in the Philosophical Transactions

1843 ◽  
Vol 4 ◽  
pp. 431-432
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
The Other ◽  
Central Portion ◽  
Thick Wall ◽  
Altered State ◽  
Chemical Reagents ◽  
Other Hand ◽  
Double Contour

The author points out what he considers to be important errors in the series of papers by Dr. Martin Barry, which have lately appeared in the Philosophical Transactions, and are entitled, “ On the Corpuscles of the Blood ," and “ On Fibre ." He alleges that Dr. Barry has generally confounded the colourless corpuscles contained in the blood with the red corpuscles of the same fluid; each of which latter kind consists of a vesicle or cell, with thick walls, but in a collapsed and flattened state, and having therefore a biconcave form, and in consequence of its thick wall being doubled on itself, presenting under the microscope a broad circumferential ring, which is illuminated or shaded differently from the depressed central portion, according to the focal adjustment of the instrument: while the colourless corpuscles, on the other hand, are of a globular shape, strongly refractive of light, and granulated on their surface, and are of less specific gravity and of somewhat larger size than the red corpuscles. The author quotes various passages from Dr. Barry’s papers in proof of his assertions, and refers particularly to fig. 23 of his second paper on the corpuscles of the blood. He farther states, that Dr. Barry’s description of the appearances of what he terms the red corpuscles, in paragraphs 53, 68, and 76 of his second paper, can, in fact, apply only to the colourless corpuscles: and he observes, that even when Dr. Barry does, at last, in his “Additional Observations,” advert to the distinction between the red and the colourless globules, he considers the latter as being merely “the discs” contained in the red globules appearing under an altered state. The author regards as wholly erroneous the notion which Dr. Barry entertains that a fibre exists in the interior of the blood-cor­puscle; and that these fibres, after their escape from thence, constitute the fibres which are formed by the consolidation of the fibrin of the liquor sanguinis . The beaded aspect presented by the double contour of the thick wall of the red corpuscle when it has been acted upon either by mechanical causes or by chemical reagents, of which the effect is to corrugate the edge, and to bend it alternately in opposite directions, has, in the opinion of the author, given rise to the illusive appearance of an internal, annular fibre. The appearance of flask-like vesicles presented by some of the red corpuscles, with the alleged fibre protruding from their neck, the author ascribes altogether to the effects of decomposition, which has altered the mechanical properties of the corpuscle, and allowed it to be drawn out, like any other viscid matter, into a thread.

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