Modeling the Trans-Varestraint test with finite element method

The dependence of crack properties on the Cr/Ni equivalent ratio in AISI 304L austenitic stainless steel weld metals

“…Generally, solidification cracking occurs in the solidified BTR above the solidification line [2,5]. When the intergranular liquid film where low-melting eutectics containing impurities such as sulfur, phosphorus, titanium and niobium were converged in and segregated, remains until at a temperature below the solidification line, solidification cracking is generated if the mechanical strain exceeds the strain tolerance [21]. The fracture morphology of solidification crack as viewed using SEM is shown in Fig.…”

Experimental and numerical analysis of solidification cracking behaviour in fibre laser welding of 6013 aluminium alloy

“…Up to date, parameters such as mechanical strain, 22,24,25,35 plastic strain 23 and plastic strain rate 26,27 have been used to analyse the crack initiation. In this study, the mechanical strain was adopted to analyse the solidification cracking behaviour.…”

“…The transverse tensile strain in the weld fusion zone was deemed as the main reason of transverse solidification cracking formation. Wei et al 24 developed a finite element model of Trans-Varestraint test and pointed out that the local strain obtained from the simulation was more suitable to serve as critical values of solidification cracking. Safari et al 25 developed a thermomechanical model of TIG welding process for stainless steel 310s, and investigated the influence of various factors on the length of centreline solidification cracking.…”

Effect of weld travel speed on solidification cracking behavior. Part 1: weld metal characteristics

“…The region susceptible to solidification cracking within the mushy zone is referred to as the Crack Susceptible Zone (CZS) ( Figure 8 ) and is quantified by its length or by a range of temperature, either Brittle Temperature Range (BTR) [7,[41][42][43][44][45] or Solidification Cracking Temperature Range (SCTR) [43]. The CSZ extends usually from the coherency (Tc) to the solidus (Ts) temperature range.…”

“…Care must be taken when converting the macroscopic bending strain ( = 2 with t plate thickness and R radius of curvature of mandrel) to locally applied strain in the CSZ because simulations have demonstrated that strains are strongly localized in the trailing edge of molten pool during bending [42,44,50,53,54]. The local strains in the mushy zone can reach one order of magnitude greater than the average strain applied during bending [42,[55][56][57][58].…”