Analysis of the Suitability of Ultrasonic Testing for Verification of Nonuniform Welded Joints of Austenitic-Ferritic Sheets.

The purpose of the presented research was to determine the suitability of using ultrasonic testing (UT) to inspect heterogeneous, from a material point of view, welded joints on the example of the joints of a ferritic steel element with elements made of an austenitic steel. The echo technique with transverse (SEK) and longitudinal wave heads (SEL) addressed this issue. Due to the widespread use of 13CrMo4-5 and X2CrNiMo17-12-2 steel grades in the energy industry, they were selected as the test materials for the study.

Mechanical Properties and Microstructure of Austenite-Ferrite Duplex Stainless Steel Hybrid (Laser + GMAW) and SAW Welded Joint.

The purpose of the research was to develop a technology for producing thick-walled duplex steel welded joints. The material used in the research was X2CrNiMoN22 duplex steel in the form of a 15 mm thick plate. The welded joint was produced by the modern, high-performance Hybrid Laser Arc Welding (HLAW) method.

Evaluation of the Properties and Microstructure of Thick-Walled Welded Joint of Wear Resistant Materials.

The research was conducted on a thick-walled welded joint between the HTK 900H wear-resistant steel plates and the A6 cast profile. The aim of the experiment was to produce a joint with the relevant performance requirements, i.e.

Microstructure and Mechanical Properties of Modern 11%Cr Heat-Resistant Steel Weld Joints.

In addition to good high-temperature creep resistance and adequate heat resistance, steels for the power industry must have, among other things, good weldability. Weldability of such steels is one of the criteria determining whether or not the material is suitable for applications in the power industry. Therefore, when materials such as martensitic steel Thor 115 (T115) are introduced into the modern power industry, the quality and properties of welded joints must be assessed.

The Effect of Service on Microstructure and Mechanical Properties of HR3C Heat-Resistant Austenitic Stainless Steel.

The physical metallurgical tests were performed on the test samples made of HR3C steel, taken from a section of a pipeline in the as-received condition and after approximately 26,000 h of service at 550 °C. In the as-received condition, the test material had austenitic microstructure with numerous large primary Z-phase precipitates inside the grains. The service of the test steel mainly contributed to the precipitation processes inside the grains and at the grain boundaries.

In vivo implantation of porous titanium alloy implants coated with magnesium-doped octacalcium phosphate and hydroxyapatite thin films using pulsed laser depostion.

The use of porous titanium-based implant materials for bone contact has been gaining ground in recent years. Selective laser melting (SLM) is a rapid prototyping method by which porous implants with highly defined external dimensions and internal architecture can be produced. The coating of porous implants produced by SLM with ceramic layers based on calcium phosphate (CaP) remains relatively unexplored, as does the doping of such coatings with magnesium (Mg) to promote bone formation.

Pelvic fractures in children and adolescents in polytrauma and high-energy injuries.

Background: This paper is a retrospective analysis of the treatment of pelvic fractures in children and adolescents who sustained polytrauma and high-energy injuries. Incidence varies from 0.2% to 7.

[Analysis of treatment results of humeral lateral condyle fractures in children].

On the basis of 60 cases authors analyze treatment results of the humeral lateral condyle fractures in children. This type of fracture is a second most common elbow fracture in children after supracondylar fracture of the humerus. Authors consider this fracture to be the most difficult to diagnose among all elbow injuries.

[Application of Ponseti method in case of neglected talipes equinovarus in 4 years and 9 months old boy with DiGeorge syndrome--case report].

Case report of application of Ponseti method in treatment of neglected congenital talipes equinovarus in boy with DiGeorge syndrome who was 4 years and 9 months of age at the beginning of the treatment. Foot was classified as very severe, scored 4.5 points according to Pirani and 15 points according to DiMeglio classification.

[Results of treatment of the intercondylar eminence of tibia in children].

Fracture of the tibial eminence in children is a condition in which there is no widely accepted and approved therapeutic scheme. The greatest divergence of treatment options concerns type II according to Mayers and McKeever classification. Described therapeutic options range from cast immobilisation of the lower extremity without attempt of closed reduction to open reduction with internal fixation.

[Split posterior tibial tendon transfer as a selected technique of treatment of spastic equino-varus deformity in children].

Equinovarus deformity is one of the most common deformities seen in patients with cerebral palsy. During years between 1993 and 2004 in 36 patients with cerebral palsy 46 operative procedures of split posterior tibial tendon transfer to peroneus brevis muscle were performed to correct varus deformity of the foot. Additionally equinus was corrected by lengthening lengtheninglengthening of the calcaneal tendon in 42 cases and in 4 cases by gastrocnemius recession according to Baker modification of Vulpius procedure.

[The surgical treatment of proximal humerus fractures in children and adolescent].

The aim of his study was to evaluate outcomes of the surgical treatment of proximal humerus fractures in children. The studied group consisted of 24 patients who were operated on during the period 1997-2006. Operative and postoperative complications were evaluated.

[Feet deformation treatment in children with arthrogryposis multiplex congenita (AMC)--evaluation of the results].

In Arthrogryposis Multiplex Congenita (AMC) feet deformations are frequent. They have form of talipes equinovarus, or less frequently of plano-valgus. The study included influence of various surgical techniques on final result of foot treatment in arthrogryposis.