Tensile properties of shielded metal arc welded ultrahigh hard armour steel joints

The present generation Armoured Tracked Vehicles (ATVs) are constructed using Rolled homogenized armour (RHA) grade steels closely confirming with AISI 4340 specifications. However, in future Armoured Tracked Vehicles (ATVs), the overall weight of ATVs has to be reduced enormously and hence, the designers have prescribed to employ Ultra High Hard Armour (UHA) steels for the construction. Welding is considered to be one of the important fabrication methods in ATVs construction. However, welding of UHA steels is highly challenging due to higher hardness and higher carbon content. Shielded Metal Arc Welding (SMAW) is among the most widely employed welding process in the construction of ATVs since it is more versatile and cost-effective. Armour grade steels are welded conventionally using Austenitic Stainless Steel (ASS) consumables to eliminate the serious problems of hydrogen induced cracking. Hence, in this investigation, an attempt has been made to study the influence of ASS welding consumables on tensile properties and hardness of UHA steel joints made by SMAW process. UHA steel plates having 15 mm thickness were welded by SMAW process using five different ASS consumables (having different Creq/Nieq ratio). Tensile properties (unnotched and notched) of the welded joints were evaluated. From this investigation, it was observed that the joint welded using ASS consumable (having higher Creq/Nieq ratio) exhibited superior tensile properties as result of the evolution of ferrite phase with vermicular and globular morphology in the austenite matrix at weld metal region.

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Exploration of Tensile Properties of Low Carbon Steel Welded Joint

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset218413 ◽

2021 ◽

pp. 49-55

Author(s):

P. Senthilkumar

Keyword(s):

Carbon Steel ◽

Tensile Properties ◽

Arc Welding ◽

Welded Joint ◽

Low Carbon Steel ◽

Welding Process ◽

Welding Current ◽

Low Carbon ◽

Shielded Metal Arc Welding ◽

Metal Arc Welding

The effect of welding current on the tensile properties of low carbon steel welded joint was investigated in this research. In this work mild steel plates were joined by shielded metal arc welding process which is also known as manual metal arc welding used to examine optimum welding current. The welded samples were cut and machined to standard configurations for tensile tests. It was concluded that variation of current affect the tensile properties of the low carbon steel welded joint. As the current increases from 80A to 110A, the ultimate tensile strengths and yeild strength increases. The percentage elongation decreases with increase in welding current but increases at the welding current of 110A.

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Investigation on the effect of mechanical vibration in mild steel weld pool

Manufacturing Review ◽

10.1051/mfreview/2019020 ◽

2019 ◽

Vol 6 ◽

pp. 21 ◽

Cited By ~ 1

Author(s):

Pravin Kumar Singh

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Impact Strength ◽

Mild Steel ◽

Mechanical Vibration ◽

Weld Zone ◽

Welding Process ◽

Steel Plates ◽

Shielded Metal Arc Welding ◽

Metal Arc Welding

This study presents a new concept of a vibratory welding setup which can transfer the mechanical vibrations in the weld zone during Shielded Metal Arc welding (SMAW) process and can also produce the resonance frequency of 300 Hz. In the present investigation mild steel plates of 6 mm thickness has been butt welded using both conventional and vibratory welding conditions. Microstructure and the mechanical properties of the butt welded joints were evaluated, and the results were compared. Further, in order to optimize the process parameters of vibratory welding technique Taguchi and analysis of variance (ANOVA) technique have been adopted. The responses considered for analysis are hardness, ultimate tensile strength (UTS) and impact strength. The result of the study indicates that by applying the vibratory treatment during welding process the mechanical properties such as hardness, tensile strength and impact strength have been enhanced. Lastly, the obtained results are correlated from the results in the past researches.

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The protective capability of the laser welded armour steel plates

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420720906429 ◽

2020 ◽

Vol 234 (5) ◽

pp. 711-721

Author(s):

D Pacek ◽

P Kolodziejczak ◽

K Grzelak ◽

J Torzewski ◽

P Podgorzak

Keyword(s):

Arc Welding ◽

Gas Metal Arc Welding ◽

Welding Process ◽

Bonding Process ◽

The Body ◽

Steel Plates ◽

Shielded Metal Arc Welding ◽

Metal Arc Welding ◽

Armour Steel ◽

Intensive Development

Despite the intensive development of plastics and composite materials in the case of armours employed to protect vehicles, armour steel remains a material commonly and effectively used. This is especially evident in the base armour of armoured vehicles, where the body is made of welded armour steel plates. However, the area of joining both the weld and the heat affected zone are sensitive areas with the reduced protective capability. In the case of laser welding in comparison with methods such as shielded metal arc welding and gas metal arc welding, it is possible to narrow down the above mentioned areas. The paper presents the results of research on the protective capability of welded zone of armour steel plates with a hardness of 500 HB. In the first part of the work, in order to select the proper parameters for the bonding process, different connection variants were made and their microstructure and selected mechanical properties were analysed. After selecting the best variant of the welding process, samples (200 mm × 200 mm) consisting of two welded plates with dimensions 100 mm × 200 mm were made for testing. The thickness of the plates was selected in such a way that in the areas outside the bonding zone, the lack of complete perforation by the projectiles used in the tests is guaranteed. The samples were shot at the weld location and at different distances from the weld to verify, for the chosen method of joining steel plates, if the welded armour loses its protective capability and, possibly, how wide this area may be.

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INCO-WELD B ELECTRODE

Alloy Digest ◽

10.31399/asm.ad.ni0307 ◽

1984 ◽

Vol 33 (12) ◽

Keyword(s):

Corrosion Resistance ◽

Tensile Properties ◽

Arc Welding ◽

Base Alloy ◽

Heat Treating ◽

Alternating Current ◽

Nickel Base Alloy ◽

Shielded Metal Arc Welding ◽

Metal Arc Welding ◽

Nickel Base

Abstract INCO-WELD B is a nickel-base alloy developed for shielded metal-arc welding of nickel steels for cryogenic applications. It is similar to INCO-WELD A Electrode (Alloy Digest Ni-305, November 1984) except that it is designed for use with alternating current to minimize magnetic arc blow. It can be operated in all welding positions. This datasheet provides information on composition and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-307. Producer or source: Huntington Alloys.

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INCO-WELD C

Alloy Digest ◽

10.31399/asm.ad.ss0632 ◽

1996 ◽

Vol 45 (1) ◽

Keyword(s):

Tensile Properties ◽

Stainless Steels ◽

Arc Welding ◽

Carbon Steels ◽

Alloy Electrode ◽

Shielded Metal Arc Welding ◽

Medium Carbon ◽

Metal Arc Welding ◽

Spring Steels ◽

Medium Carbon Steels

Abstract INCO WELD C Electrode is a stainless-alloy electrode especially designed for shielded-metal-arc welding of a broad range of materials, including many difficult-to-weld compositions. It can be used in stainless steels, mild and medium-carbon steels,and spring steels. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on joining. Filing Code: SS-632. Producer or source: Inco Alloys International Inc.

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