bending fatigue behaviour and microstructure in welded


T. VUHERER et al.:BEHAVIOUR OF COARSE GRAIN HEAT AFFECTED ZONE DURING CYCLE LOADING Load ratio R was -1 due to rotation bending. The continuing line represented the S-N curve of the CG HAZ microstructure. The fatigue limit was relative-ly low, only 330 MPa. This was the lowest stress limit beyond which specimen did not break after 10 million cycles. Bending Fatigue and Microstructure of Fillet Welded Joints Mar 28, 2017 · Bending Fatigue and Microstructure of Fillet Welded Joints with High Chromium Stainless Pipe for Catalyst Muffler 2017-01-0472 To prevent corrosion of the inlet part with aqueous ammonia injection, high chromium corrosion-resistant materials have been applied for welded joints of mufflers.

Fatigue Behavior of Welded API 5L X70 Steel Used in

Aug 18, 2020 · In this study, fatigue failure behavior of welded X70 pipeline steel was investigated by rotating bar bending fatigue tests performed at room temperature. S N curves of base metal, weld and heat-affected zone (HAZ) were plotted. Tension tests, hardness measurements and Charpy V-notched impact tests were carried out for mechanical characterization. Fatigue Crack Growth Behavior of the MIG Welded Joint of In this paper, the fatigue crack growth behavior of the base metal (BM), the weld metal (WM) and the heat-affected zone (HAZ) in the metal-inert gas (MIG) welded joints of the 06Cr19Ni10 stainless steel are analyzed and studied. Results of the fatigue crack propagation tests show that a new fatigue INFLUENCE OF STRESS RELIEVING BY VIBRATION ON THE Abstract. Abstract Constant amplitude fatigue tests with welded specimens under fully reversed fourpoint bending as well as under axial loading have shown that vibration stress relieving does not lead to a fatigue life improvement of welded parts when compared to the aswelded state. Thus, a substitution of thermal stress relieving by a vibration treatment is not successful.

Influence of Shot-Peening on fatigue behavior Orbital

Figure 5:Results of the bending fatigue tests (R = -1) 10' The microhardness profiles are presented in Figure 6. The surface hardness (left) increases up to 50 HV 0.1. It appears that the weld line (0,0 +/-200 µm) is less affected by the peening process. The bulk hardness measured along the weld line shows that shot peening lead to a Relationships among the Microstructure, Mechanical

  • AbstractIntroductionExperimental ProceduresResultsDiscussionConclusionsAcknowledgmentsThe microstructures of Ti6Al4V are complex and strongly affect its mechanical properties and fatigue behavior. This paper investigates the role of microstructure on mechanical and fatigue properties of thin-section Ti6Al4V sheets, with the aim of reviewing the effects of microstructure on fatigue properties where suboptimal microstructures might result following heat treatment of assemblies that may not be suited to further annealing, for example, following laser welding. Samples of Ti6Al4V sheet were subjecMicrostructure, Tensile Properties, and Fatigue Behavior Overall, the fatigue behavior of the Ti-6242 linear friction welds was similar to that of the as-received Ti-6242 alloy (Figure 12a), and failure during cyclic loading at all stress levels was observed to occur exclusively in the PM region, roughly 3 ± 1 mm away from the WC, which provides a good assurance of the weld integrity. The SRAed Ti The Effect of Microstructure and Axial Tension on Three The effects of microstructure and axial tension on the fatigue behavior of TC4 titanium alloy in high cycle (HCF) and very high cycle (VHCF) regimes are discussed in this paper. Ultrasonic three-point bending fatigue tests at 20 kHz were done on a fatigue life range among 10 5 10 9 cycles of the alloys with equiaxed, bimodal and Widmanstatten microstructures.


    Abstract In response to the increasing structural applications in duplex steels for welded structures, fatigue behaviour of a SAF 2304 grade duplex stainless steel was investigated, considering both the base metal and GTAW welded joints. Fatigue curves and fatigue limits under rotary bending fatigue were obtained. The study focused attention on the microstructural features of fatigue crack propagation of the two series of experiments, thereby permitting an evaluation of the tortuous crack