Effect of ER4043 and ER5356 filler wire on mechanical properties and microstructure of dissimilar aluminium alloys, 5083-O and 6061-T6 joint, welded by the metal inert gas welding

Sering kali di industri suatu komponen atau struktur dari logam aluminium (aluminium alloys) harusmengalami proses manufaktur pengelasan (welding) sebagai salah satu metode penyambungan logam (metaljoining) dan perlakuan panas (heat treatment) untuk memperoleh atau mengubah sifat tertentu dari logamtersebut, karena itu perlu dilakukan analisis terhadap kombinasi kedua proses tersebut. Penelitian inibertujuan mengetahui pengaruh kombinasi pengelasan dan perlakuan panas terhadap sifat mekanik(mechanical properties) logam aluminium.Material teknik yang digunakan adalah logam aluminium 6061, proses pengelasan yang dilakukanadalah tungsten inert gas (TIG welding) atau GTAW (Gas Tungsten Arc Welding), proses perlakuan panasyang dilakukan adalah aging (precipitation hardening/ strengthening), pengujian yang dilaksanakan adalahpengujian tarik (tensile/tension test) dan pengujian kekerasan (hardness test).Kekuatan logam rata-rata setelah dilakukan proses pengelasan adalah 28,5 Kgf/mm2 artinya logamini mampu menahan beban hingga sebesar itu tanpa mengalami perpatahan (fracture), sedangkan kekuatanlogam lasan setelah dilakukan proses perlakuan panas rata-rata meningkat menjadi 48,7 Kgf/mm2. Secaraumum nilai kekerasan logam berbanding lurus dengan kekuatannya sehingga kekerasan logam lasan setelahdilakukan proses perlakuan panas juga meningkat. Kesimpulan yang diperoleh dari penelitian ini adalahbahwa proses perlakuan panas artificial aging pada hasil proses pengelasan logam aluminium secara umumakan meningkatkan sifat mekanik.

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Effects of Welding Parameters on Microstructure and Mechanical Properties of the Joint of the Magnesium Alloy AZ31B

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.480-481.53 ◽

2011 ◽

Vol 480-481 ◽

pp. 53-58

Author(s):

De Xin Sun ◽

Shi Jun Luo ◽

Hong Zhuang Zhang ◽

Da Qian Sun

Keyword(s):

Mechanical Properties ◽

Heat Affected Zone ◽

Welding Current ◽

Inert Gas ◽

Welding Parameters ◽

Grain Coarsening ◽

Microstructure Change ◽

Magnesium Alloy Az31b ◽

Metal Inert Gas Welding ◽

Equiaxed Grains

Through the metal inert gas welding (MIG) experiment, the effects of the different welding parameters on the microstructure, the weld configuration and the mechanical properties of the joint of the magnesium (Mg) alloy AZ31B were analyzed. The results indicate that with the increase in the welding current, the microstructure change of the weld is characterized by the grain coarsening, and the microstructure change of the heat affected zone is characterized by the grain coarsening and the broadening of the heat affected zone. An exorbitant welding current is inimical to the weld configuration. With the increase in the welding speed, the welding linear energy decreases, inducing the formation of the finer equiaxed grains in the weld. Moreover, the grains in the heat affected zone are also with the trend of the refinement, and thus the mechanical properties of the joint increase. The optimal welding current and speed in our experiment are 160-170A and 400-450mm/min, respectively.

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STUDY OF MECHANICAL PROPERTIES IN MILD STEEL USING METAL INERT GAS WELDING

International Journal of Research in Engineering and Technology ◽

10.15623/ijret.2014.0304133 ◽

2014 ◽

Vol 03 (04) ◽

pp. 751-756 ◽

Cited By ~ 5

Author(s):

Rakesh Kumar .

Keyword(s):

Mechanical Properties ◽

Mild Steel ◽

Inert Gas ◽

Metal Inert Gas Welding

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Effect of welding and heat treatment on the properties of UHSS used in automotive industry

EPJ Web of Conferences ◽

10.1051/epjconf/202125005015 ◽

2021 ◽

Vol 250 ◽

pp. 05015

Author(s):

Gulshan Noorsumar ◽

Dmitry Vysochinskiy ◽

Even Englund ◽

Kjell G. Robbersmyr ◽

Svitlana Rogovchenko

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Automotive Industry ◽

High Strength ◽

Heat Treatments ◽

Inert Gas ◽

Element Analysis ◽

Heat Treated ◽

Ultra High Strength Steel ◽

Metal Inert Gas Welding

This paper deals with the undesired effects of the heat treatments on the mechanical properties of (UHSS) Ultra High Strength Steel used nowadays in automotive industry to improve crashworthiness performance of vehicles. The UHSS specimens were extracted from certain parts of the car body and subjected to different heat treatments. Four types of specimens were tested: untreated, welded with metal inert gas welding, heat treated at 800 °C, and heat treated at 1250 °C. All heat-treated specimens showed dramatically reduced values of strength. The results suggest that it is important to follow the official repair manuals avoiding unnecessary welding and improper heat treatments of UHSS. The experiments provide the data necessary for constructing a constitutive model and performing a finite-element analysis of improperly repaired UHSS parts.

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