Comparison of Residual Stress Measurements Conducted by X-ray Stress Analysis and Incremental Hole Drilling Method

Abstract

The level of residual stresses is of great importance for many applications. In this work, the two established residual stress analysis methods x-ray stress analysis and incremental hole-drilling combined with electronic speckle pattern interferometry are compared. Each stress analysis method has its specific limitations. Furthermore, the residual stress state of a material is influenced by its processing history. To compare both methods, aluminum-based specimens (AlCu6Mn, AlZn5.5MgCu) with different processing histories were investigated. Measurements with both methods were conducted on the same specimens and on the same measurement spots. Highest stress levels were found in the mechanically machined specimen, while heat treatment via tempering or deposition welding shows reduced stress levels inside of the specimens. In case of cold spraying, the stresses in the feedstock material are considered negligible. In contrast, cold-spray coatings deposited on construction steel substrate exhibited tensile stresses, which relax over time at room temperature.

Metal Knitting: A New Strategy for Cold Gas Spray Additive Manufacturing

“…The literature presents the application of CS for AM for a large number of materials, highlighting the components made from 316L stainless steel [ 10 , 11 , 12 , 13 , 14 ], Cu alloys [ 15 , 16 , 17 ], and Ti alloys [ 18 , 19 , 20 , 21 ], but not limited to them since Al alloys [ 21 , 22 , 23 , 24 ], Ni superalloys [ 25 , 26 ], maraging steel [ 27 , 28 , 29 ], and many others have also been studied. Moreover, these CSAM components have interested different sectors, such as aerospace, automotive, energy, medical, and marine sectors, among others [ 8 , 30 ].…”

Balancing crystallization rate in a mixed Sn–Pb perovskite film for efficient and stable perovskite solar cells of more than 20% efficiency

“…As is wellknown, the decrease in compressive residual stress of the perovskite lm will increase the crystal lattice spacing, which means that the grain number in the same deposition area decreases while the grain size increases. [46][47][48] In our results, the reduced compressive residual stress in [PNA]BF 4 treated lm makes the crystal lattice spacing increase, leading to the enlargement in grain size. This in turn is beneted from the uniform crystallization of Sn-/Pb-component perovskite crystals and promotes high crystalline quality of the perovskite lm.…”

A Review on Damage Monitoring and Identification Methods for Arch Bridges

“…The stress was the smallest in the middle and gradually increased to both sides in both vertical and horizontal directions. Bobzin et al [74] measured the residual stress distribution along the depth direction of the aluminum-based coating of the steel structure by the drilling method and found that the heat treatment had a relaxation effect on the residual stress level of the coating. Mohamed et al [75] measured the residual stress of stainless steel coatings with different thicknesses by the drilling method.…”