Effect of heat treatment on mechanical and ballistic properties of a high strength armour steel

Jena, Pradipta Kumar; Mishra, Biswajit; RameshBabu, M.; Babu, Arvindha; Singh, A. K.; Sivakumar, K.; Bhat, T. Balakrishna

doi:10.1016/j.ijimpeng.2009.09.003

Cited by 102 publications

(58 citation statements)

References 16 publications

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“…This alloy is potential for armour applications due to excellent properties. Armour steels [2] are the widely used metallic armour materials nowadays due to excellent strength and hardness with superior toughness making them suitable for armour applications. WEDM plays significant role in cutting conductive materials to produce intricate profiles and complex shapes.…”

Section: Introductionmentioning

confidence: 99%

Modelling and analysis of material removal rate and surface roughness in wire-cut EDM of armour materials

Bobbili

Madhu

Gogia

2015

Engineering Science and Technology, an International Journal

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a b s t r a c tThe current work presents a comparative study of wire electrical discharge machining (WEDM) of armour materials such as aluminium alloy 7017 and rolled homogeneous armour (RHA) steel using buckingham pi theorem to model the input variables and thermo-physical characteristics of WEDM on material removal rate (MRR) and surface roughness (Ra) of Al 7017 and RHA steel. The parameters of the model such as pulse-on time, flushing pressure, input power, thermal diffusivity and latent heat of vaporization have been determined through design of experiment methodology. Wear rate of brass wire increases with rise in input energy in machining Al 7017. The dependence of thermo-physical properties and machining variables on mechanism of MRR and Ra has been described by performing scanning electron microscope (SEM) study. The rise in pulse-on time from 0.85ms to 1.25ms causes improvement in MRR and deterioration of surface finish. The machined surface has revealed that craters are found on the machined surface. The propensity of formation of craters increases during WEDM with a higher current and larger pulse-on time.

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Section: Introductionmentioning

confidence: 99%

Modelling and analysis of material removal rate and surface roughness in wire-cut EDM of armour materials

Bobbili

Madhu

Gogia

2015

Engineering Science and Technology, an International Journal

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“…Hasil pengujian kekerasan ditampilkan pada gambar 4, dalam kondisi quench bahan memiliki batas kekuatan dan kekerasan tertinggi namun keuletannya terendah dan sejumlah besar distorsi terjadi selama pembentukan martensite yang mengarah ke peningkatan kekuatan dan kekerasan [8].…”

Section: Pengujian Kekerasanunclassified

PENINGKATAN NILAI KEKERASAN BAJA C-Mn DENGAN METODE QUENCHING DAN TEMPERING

Yanuar¹,

Mujiarto²,

Janto³

2018

Simet

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ABSTRAKPerlakuan panas quenching dan tempering telah lama diterapkan pada baja untuk menghasilkan kombinasi antara kekuatan dan ketangguhan yang baik dengan struktur mikro martensite. Sifat baja seperti kekerasan yang tinggi dengan kombinasi ketangguhan yang baik membuat baja menjadi pilihan utama untuk material armor (tahan peluru). Tujuan penelitian ini melakukan kajian perubahan sifat mekanis baja komersial (baja C-Mn) akibat proses quenching dan tempering untuk dapat diaplikasikan sebagai baja armor. Pemanasan pada temperatur austenit 900 °C dengan penahanan selama 45 menit kemudian dilakukan quenching pada media air dilanjutkan tempering 175 °C selama 30 menit didapatkan nilai kekerasan tertinggi sebesar 546 BHN dengan dominasi struktur mikro martensite yang terbentuk.Kata kunci: armor, kekerasan, quenching, tempering. ABSTRACTThe heat treatment of quenching and tempering has long been applied to steel to produce a combination of good strength and toughness with martensitic microstructure. The high hardness properties of steel with good toughness combine make steel the ultimate choice for armor material. The purpose of this research is to study the change of mechanical properties of commercial steel (C-Mn steel)

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“…Light-weight materials that can be used in ballistic covers of this type include: strong steel, aluminium-based alloys, magnesium-and titanium-based alloys, and metal and polymer matrix composites [6,7,13,17,18,23,26]. As fibre-reinforced polymer composites combine light weight with very good mechanical properties, they are used in demanding structural applications.…”

Section: Introductionmentioning

confidence: 99%

Layered composite increasing the resistance of patrol and intervention vehicles to the impact of improvised explosive devices (IED) from below

Szudrowicz¹

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionPatrol and intervention cars are used in regions threatened by terrorism for purposes such as:patrolling areas where there is a risk of fire attacks and explo-• sions of explosive charges; intervention activities, in particular combating terrorist groups; • peace-keeping operations, separating belligerents, and restoring • and maintaining public order; transporting officers and other persons and cargoes requiring • special protection; transporting and ensuring the functioning of devices and appara-• tus used for reconnaissance, identification, and recording.As for the detonation of small fragmentation explosive charges, i.e.: anti-personnel mines, hand grenades, and improvised charges, two major types of impact that endanger the lives and health of personnel can be distinguished. These are: the impact of fragments and the impact of the shock wave. The most unfavourable situation is an under-vehicle explosion. Due to the small distance from the target (at the moment, the clearance in passenger off-road vehicles is approx. 0.3÷0.5 m), fragments hit the floor material, which is pre-loaded with the shock wave. Very frequently, in such types of cars, the personnel keep their legs directly on the floor and the seats are made of thin textiles.Requirements for the ballistic protection of cars should be considered in parallel with requirements concerning their mobility [15]. This necessitates the use of light materials for ballistic protection covers. On the other hand, such protections are usually required to perform the function of structural components, e.g. due to the manner of their installation, which is why the materials should be characterised by appropriate strength and rigidity. Modern materials for automotive applications, including ballistic covers for special cars, need to satisfy the requirements of multifunctionality and cost-effectiveness in the areas of production, operation, and disposal [9,10,11,25,29].The purpose of the study was to develop an additional, self-supporting ballistic cover for car bottoms, mounted on the outside to prevent the perforation of the base floor. In currently-used cars, the floor is usually made of ordinary steel sheets having a thickness of 1÷1.5 mm. Szudrowicz M. Layered composite increasing the resistance of patrol and intervention vehicles to the impact of improvised explosive devices (iEd) from below. Eksploatacja i Niezawodnosc -Maintenance and reliability 2018; 20 (1): 9-15, http://dx

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Effect of heat treatment on mechanical and ballistic properties of a high strength armour steel

Cited by 102 publications

References 16 publications

Modelling and analysis of material removal rate and surface roughness in wire-cut EDM of armour materials

Modelling and analysis of material removal rate and surface roughness in wire-cut EDM of armour materials

PENINGKATAN NILAI KEKERASAN BAJA C-Mn DENGAN METODE QUENCHING DAN TEMPERING

Layered composite increasing the resistance of patrol and intervention vehicles to the impact of improvised explosive devices (IED) from below

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