On the origin of deformation microstructures in austenitic stainless steel: part I—microstructures

Lee, E.H.; Byun, Thak Sang; Hunn, John D.; Yoo, M.H.; Farrell, K.; Mansur, L.K.

doi:10.1016/s1359-6454(01)00193-8

Cited by 105 publications

(56 citation statements)

References 16 publications

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“…In metals with lower stacking fault energies, such as stainless steel and Ti-6Al-4V, the dislocation structures that develop are markedly different from nickel ( Figure 10) [18,22,[60][61][62]. In these metals the microstructure is dominated by dislocation tangles and dislocation walls, which lie along the dominant slip planes [56,57] rather than the subgrain and cell structure found in nickel.…”

Section: Figure 9 the Change In Crystal Size (In å) Plotted Againstmentioning

confidence: 99%

“…An additional reason for the choice of these alloys is that their deformation microstructure has been well researched [17][18][19][20][21][22].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Hence, it is the only alloy that has a DPPA size that can be compared with other measurements. When a cell structure develops, the dislocation cell size (D) has been found to be almost inversely proportional to the flow stress [18,36,59]. (3) where, Ω is a constant found to be 14 for nickel [59], m a constant found to be 0.98 for nickel [59], G is the shear modulus and b the magnitude of the Burgers vector.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

2016

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A range of diffraction peak profile analysis (DPPA) techniques were used to determine details of the microstructure of plastically deformed alloys. Four different alloys were deformed by uniaxial tension and compression to a range of strains. The methods we have considered include, the full-width, Williamson-Hall methods, Warren-Averbach methods, and van Berkum's alternative method. Different metals were chosen to understand the effect of the deformation microstructure and crystal structure, a nickel alloy, two stainless steel alloys and two titanium alloys.

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Section: Figure 9 the Change In Crystal Size (In å) Plotted Againstmentioning

confidence: 99%

“…An additional reason for the choice of these alloys is that their deformation microstructure has been well researched [17][18][19][20][21][22].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

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An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

2016

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Section: Introductionmentioning

confidence: 99%

“…Microstructural changes can be produced in austenitic steels depending on the material and test conditions [4,5]. In verified studies, several methods have produced significant results in TEM microstructural analysis [4,6]. Test temperature, strains range, and the radiation dose are parameters that affect ductility in austenitic steels [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effects of X-rays Radiation on AISI 304 Stainless Steel Weldings with AISI 316L Filler Material: A Study of Resistance and Pitting Corrosion Behavior

Carrasco

Guillamón

Pérez-Puig

2016

Metals

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This article investigates the effect of low-level ionizing radiation, namely X-rays, on the micro structural characteristics, resistance, and corrosion resistance of TIG-welded joints of AISI 304 austenitic stainless steel made using AISI 316L filler rods. The welds were made in two different environments: natural atmospheric conditions and a closed chamber filled with inert argon gas. The influence of different doses of radiation on the resistance and corrosion characteristics of the welds is analyzed. Welded material from inert Ar gas chamber TIG showed better characteristics and lesser irradiation damage effects.

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Analysis on the Structural Transformation of ITER TF Conductor Jacket Tube

Yang

Huang

et al. 2014

Adv Eng Mater

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The international experimental fusion project (ITER) has entered the construction phase. It will have to integrate and test all essential fusion power reactor technologies and components while demonstrating the safety and environmental acceptability of fusion. [1,2] In cable-in-conduit conductor (CICC) magnets, [3][4][5][6][7] such as the toroidal-field (TF) coils, the conduit is the primary structural component. 316LN stainless steel material (SS) has been chosen as the TF jacket, [8,9] due to its good mechanical properties at elevated temperatures, its excellent corrosion resistance and fabricability. [10] Several investigations have been published on the mechanical properties and property changes occurring during exposure to steam plant and reactor environment. [11][12][13][14] New evidence supports applying the alternative way to optimize the solution anneal treatment of the modified 316LN SS at 1100 ºC can enhance the elongation at fracture, which satisfy the ITER specifications. [15] However, we realize that literature data on the microstructural changes occurring toward ITER design are scarce and in some instances of great importance. Inspired by these and the urgency of the ITER project, we embarked on structural studies of the modified TF jacket after tensile test at RT, 77 and 4.2 K. The purpose of the present investigation was: (i) to determine the mechanism of the phase deformation as a function of temperature and tension, (ii) to determine the content and the distribution of the deformation induced martensite (DIM), and (iii) to hypothesize a model for the observed phase reactions, which potentially may yield a general understanding of TF jacket in ITER applications. This work provides a possible mechanism underlying the stressstrain and free energy linking to structure transformation and reveals a profound connection between the grain morphology changes and phase deformation.We show theoretically that the typical of a face centered cubic lattice (fcc) structure, [16] together with the presence of a body centered cubic (bcc) peaks, [17] has been identified. Tensile test operated at RT and 77 K induce no phase transformation, the same phenomenon in specimens under-going cooling experiments to cryogenic temperature (12, 15, 18, 20, 30 K, etc.), it is thereby to conclude that the structure is governed by both external stress and free energy. [18][19][20] As is shown in Figure 1c, the temperature at which a 0 -martensite formation begins on cooling (M S 0 ) was thought to be <4 K. [21] That is why the cooling condition here (to 12 K) does not cause any phase transformation. As condition of a temperature between M d and M S 0 , the applied stress or the plastic strain influence the free energy change, which act as the driving force and can cause phase transformation. When temperaturedependent energy (DG t ) decreases, less force-dependent energy (DG f ) is needed. Thus, the tensile test at 4.2 K is thought to induce a 0 -martensite easily.According to Figure 1a, positions at the tensile tested tube (4.2 ...

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On the origin of deformation microstructures in austenitic stainless steel: part I—microstructures

Cited by 105 publications

References 16 publications

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

Effects of X-rays Radiation on AISI 304 Stainless Steel Weldings with AISI 316L Filler Material: A Study of Resistance and Pitting Corrosion Behavior

Analysis on the Structural Transformation of ITER TF Conductor Jacket Tube

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