Effect of grain boundary engineering on the microstructure and mechanical properties of copper containing austenitic stainless steel

Sinha, Shyam Kanta; Kim, Dong Ik; Fleury, Éric; Suwas, Satyam

doi:10.1016/j.msea.2014.11.053

Cited by 59 publications

(14 citation statements)

References 25 publications

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“…During crack propagation, the crack path was much longer for the HABs than the LABs. When cracks encountered the HAB, they required more energy to induce a boundary slip, thus preventing crack propagation [24]. Furthermore, the UTS and YS were affected by the combined effects of δ-ferrite and HAB during the crack initiation and propagation.…”

Section: Discussionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Heat-Affected Zone of Repeated Welding AISI 304N Austenitic Stainless Steel by Gleeble Simulator

Guo

Liu

Zhang

et al. 2018

Metals

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Heat-affected zone (HAZ) of welding joints critical to the equipment safety service are commonly repeatedly welded in industries. Thus, the effects of repeated welding up to six times on the microstructure and mechanical properties of HAZ for AISI 304N austenitic stainless steel specimens were investigated by a Gleeble simulator. The temperature field of HAZ was measured by in situ thermocouples. The as-welded and one to five times repeated welding were assigned as-welded (AW) and repeated welding 1–5 times (RW1–RW5), respectively. The austenitic matrices with the δ-ferrite were observed in all specimens by the metallography. The δ-ferrite content was also determined using magnetic and metallography methods. The δ-ferrite had a lathy structure with a content of 0.69–3.13 vol.%. The austenitic grains were equiaxial with an average size of 41.4–47.3 μm. The ultimate tensile strength (UTS) and yield strength (YS) mainly depended on the δ-ferrite content; otherwise, the impact energy mainly depended on both the austenitic grain size and the δ-ferrite content. The UTS of the RW1–RW3 specimens was above 550 MPa following the American Society of Mechanical Engineers (ASME) standard. The impact energy of all specimens was higher than that in ASME standard at about 56 J. The repeated welding up to three times could still meet the requirements for strength and toughness of welding specifications.

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Section: Discussionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Heat-Affected Zone of Repeated Welding AISI 304N Austenitic Stainless Steel by Gleeble Simulator

Guo

Liu

Zhang

et al. 2018

Metals

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“…This corresponding twin boundaries Of the type {111}||{111} are known as coherent symmetric twist Σ3 boundaries. 13,20,27,35) The misorientation peak for Σ9 boundary lies at 38.9° for (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) plane along the [110] orientation. This corresponds to symmetric tilt boundaries.…”

Section: Grain Boundary Plane Distributionmentioning

confidence: 99%

“…A specific Σ boundary is oriented in a preferential direction and it can be predicted from possible CSL orientation relations from the < 100 > , < 110 > and < 111 > textures. Sinha et al 20) showed the presence of weak Bs ({110} < 112 > ), Goss ({110} < 001 > ) and Cu ({112} < 111 > ) components in austenite stainless steel. According to their observation, samples containing optimum CSL fractions (GBE samples) have stronger texture than non-GBE samples.…”

Section: Role Of Texture In Grain Boundary Character Distributionmentioning

confidence: 99%

Grain Boundary Engineering of Medium Mn TWIP Steels: A Novel Method to Enhance the Mechanical Properties

2018

Self Cite

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The grain boundary engineering (GBE) approach was employed on a medium manganese (Mn) based twinning induced plasticity (TWIP) steel to improve its mechanical properties. Two specially designed thermo-mechanical processing (TMP) routes, one involving unidirectional rolling (UDR) and the other one employing multi-step cross rolling (MSCR), with intermediate short term annealing treatment have been used. The annealing temperatures are chosen considering recrystallization and grain growth. Of the two routes, the one involving MSCR, has shown a higher fraction of special or coincident lattice site (CSL) grain boundaries. A detailed grain boundary microstructural analysis has been carried out by electron backscatter diffraction (EBSD) for differently processed samples. A significant improvement in ductility is observed in MSCR processed samples due to increase of CSL boundary fraction.

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“…Generally, the boundary strengthening is based on the impediment of dislocation motions by all sorts of boundaries [ 16 , 18 , 19 , 20 , 21 , 22 ]. The concept of grain boundary engineering (GBE) has been developed based on the knowledge of the grain boundary structure and energy in the past twenty years [ 23 , 24 , 25 ]. These developments have motivated scholars to discover the nature of dislocation–boundary interactions at different length scales.…”

Section: Introductionmentioning

confidence: 99%

Interactions between Dislocations and Boundaries during Deformation

Pan

Zhang

2021

Materials

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The interactions between dislocations (dislocations and deformation twins) and boundaries (grain boundaries, twin boundaries and phase interfaces) during deformation at ambient temperatures are reviewed with focuses on interaction behaviors, boundary resistances and energies during the interactions, transmission mechanisms, grain size effects and other primary influencing factors. The structure of boundaries, interactions between dislocations and boundaries in coarse-grained, ultrafine-grained and nano-grained metals during deformation at ambient temperatures are summarized, and the advantages and drawbacks of different in-situ techniques are briefly discussed based on experimental and simulation results. The latest studies as well as fundamental concepts are presented with the aim that this paper can serve as a reference in the interactions between dislocations and boundaries during deformation.

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Effect of grain boundary engineering on the microstructure and mechanical properties of copper containing austenitic stainless steel

Cited by 59 publications

References 25 publications

Microstructure and Mechanical Properties of Heat-Affected Zone of Repeated Welding AISI 304N Austenitic Stainless Steel by Gleeble Simulator

Microstructure and Mechanical Properties of Heat-Affected Zone of Repeated Welding AISI 304N Austenitic Stainless Steel by Gleeble Simulator

Grain Boundary Engineering of Medium Mn TWIP Steels: A Novel Method to Enhance the Mechanical Properties

Interactions between Dislocations and Boundaries during Deformation

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