Influence of Combined Loading on Microstructure and Properties of Aluminum Alloy 2024-T3

Investigation of Dependence of Microstructural Changes of Aluminum Alloy 2024-T3 Taking into Account the Type of Preliminary Load

“…Fig.4. Results of tests of specimen 2 under complex loading conditions, and of specimen 4 in static tension [11]. It means that the crystalline structure defects, which move, multiply and interact during the plastic deformation process, were in a state close to the initial one by the moment of the impact.…”

“…As seen from Fig. 2-4 and Table 2, application of the pulsed impact in a rather narrow range of preliminary static deformation (0.51-0.71%), followed by ''freezing'' of the newly formed dissipative structure in liquid nitrogen, may lead to a marked change in ductile properties of the alloy during subsequent static tension [11]. The impact applied at a value close to yield stress (specimens 2 and 3) leads to an insignificant weakening of the material (compared to static tension) and a low value of nonstationary deformation.…”

Fatigue Examination of HSLA Steel with Yield Strength of 960 MPa and Its Welded Joints under Strain Mode

“…In order to meet the increasing customer demands the metallurgical industry is still developing modern advanced structural steels with increasingly better performance characteristics. Although the advanced methods for improving the performance of structural materials present exist or are being developed [1][2][3], the reduction of total weight as the main factor affecting the production costs is achieved through the use of steels with a reduced cross-section or smaller thickness, compensated by higher strength. This approach leads to lower production costs and improved operating characteristics, such as capacity, strength or energy efficiency.…”

Modification of Mechanical Properties of High-Strength Titanium Alloys VT23 and VT23M Due to Impact-Oscillatory Loading

“…Chausov et al were the first to propose and test a simple and effective method for realizing DNP by applying additional impulse loading on materials of different classes [14][15][16]. Metallophysical experiments helped to reveal [17][18][19] that under impact-oscillatory loading, due to the pulsed introduction of energy into aluminum alloys, armco-iron, and stainless steel, there occur self-organizing processes in materials with the formation of new spatial dissipative structures, which are connected at different scale levels and look like adiabatic bands of shear. Here, it should be noted that the conditions under which these bands are formed are fundamentally different from the conditions under which adiabatic bands of shear are formed.…”

“…Previous experiments have also shown that impulse introduction of energy into a material can improve the characteristics of crack resistance. It is also interesting to note that when the DNP is realized due to the impact-oscillatory loading, a significant increase in plasticity does not lead to a significant decrease in strength [16][17][18][19][20].…”