Effect of direct quenching on the microstructure and mechanical properties of the lean-chemistry HSLA-100 steel plates

Dhua, S. K.; Sen, Shrabanee

doi:10.1016/j.msea.2011.04.084

Cited by 46 publications

(20 citation statements)

References 25 publications

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“…The higher impact strength was achieved by joint fabricated by GMAW process compared to FSW and SMAW processes. The increased percentage of bainite leads to an enhancement of tensile properties, and the presence of small cluster of martensite is detrimental to impact toughness [25]. The presence of precipitate carbides raises the impact transition temperature and lowers the charpy shelf energy.…”

Section: Effects Of Welding Processes On Impact Toughness Propertiesmentioning

confidence: 99%

Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints

et al. 2015

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Please cite this article as: Nathan SR, Balasubramanian V, Malarvizhi S, Rao AG, Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints, Defence Technology (2015), AbstractNaval grade high strength low alloy (HSLA) steels can be easily welded by all types of fusion welding processes. However, fusion welding of these steels leads to the problems such as cold cracking, residual stress, distortion and fatigue damage. These problems can be eliminated by solid state welding process such as friction stir welding (FSW). In this investigation, a comparative evaluation of mechanical (tensile, impact, hardness) properties and microstructural features of shielded metal arc (SMA), gas metal arc (GMA) and friction stir welded (FSW) naval grade HSLA steel joints was carried out. It was found that the use of FSW process eliminated the problems related to fusion welding processes and also resulted in the superior mechanical properties compared to GMA and SMA welded joints.

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Section: Effects Of Welding Processes On Impact Toughness Propertiesmentioning

confidence: 99%

Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints

et al. 2015

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“…Much of the existing published work is concerned with the type and distribution of precipitates based on single microalloy additions with idealised solution treated and ageing experiments after deformation [9,[11][12][13][14][15]. Less work has been directed towards the effects of multiple microalloy additions during the thermomechanical processing.…”

Section: Introductionmentioning

confidence: 99%

Dissolution and precipitation behaviour in steels microalloyed with niobium during thermomechanical processing

2015

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“…Additionally, this is not accomplished at the expense of toughness since grain size is the key factor in attaining the high-strength properties [1,6]. The lower amounts of alloying elements have the further advantage of reducing production costs [7,8]. However, these steels are quite sensitive to the peak temperatures and cooling rates.…”

Section: Introductionmentioning

confidence: 99%

Effect of processing temperatures on the properties of a high-strength steel welded by FSW

et al. 2018

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The need for weight reduction without compromising load-bearing capacity has driven the development of modern high-strength steels (HSS). The ability to take full advantage of these modern HSS is limited by their weldability. Friction stir welding (FSW) can join HSS at low peak temperatures, better preserving the properties of the base material. This work evaluates the influence of different FSW peak temperatures and cooling rates on the properties of a modern HSS. A HSS produced by a thermomechanically controlled process was welded by FSW with peak temperatures, measured within the processed zone, ranging from about 900 to 650°C. Temperatures were measured using thermocouples positioned at the mid-thickness of the workpiece, at 5 to 10 mm from the joint line. The effect of the different peak temperatures was evaluated by mechanical testing, including bending, tensile testing with digital imaging correlation, Charpy impact test, and hardness measurements. Microscopic analyses, including optical microscopy and electron backscatter diffraction, were used to evaluate the microstructure. Results show that FSW enables welding HSS within the intercritical temperature domain. The impact toughness of the best weld condition overmatched the base material by over 37%, at both − 40 and − 60°C. The yield strength efficiency was about 70%.

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Effect of direct quenching on the microstructure and mechanical properties of the lean-chemistry HSLA-100 steel plates

Cited by 46 publications

References 25 publications

Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints

Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints

Dissolution and precipitation behaviour in steels microalloyed with niobium during thermomechanical processing

Effect of processing temperatures on the properties of a high-strength steel welded by FSW

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