1
|
Wang W, Wu H, Sun Y, Yan J, Zhang L, Zhang S, Ni J, Song Y, Zhang X. Local intragranular misorientation accelerates corrosion in biodegradable Mg. Acta Biomater 2020; 101:575-585. [PMID: 31672584 DOI: 10.1016/j.actbio.2019.10.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/27/2019] [Accepted: 10/24/2019] [Indexed: 01/20/2023]
Abstract
Mg-based implants are used in biomedical applications predominantly because of their degradable property. In this paper, the effect of local misorientations (intragranular misorientation) on the corrosion behavior of high-purity Mg (HPM) was systematically investigated according to microstructure characterization and corrosion measurements. The results showed that local misorientation introduced into grains by deformation could result in corrosion around the grain boundary (GB), which ultimately reduces the corrosion resistance of HPM. After removing the local misorientation by annealing, the corrosion around GB could be eliminated. This work is expected to inspire better control over the degradation behaviors of biomedical Mg through microstructure design to be used for various biomedical applications. STATEMENT OF SIGNIFICANCE: 1. Fine grains, fine grains with large local misorientation, and coarse grains could be obtained, respectively, in high-purity Mg by sequential hot rolling, compression deformation, and annealing treatments. 2. Large local misorientation introduced into grains could lead to corrosion around the grain boundary and ultimately reduce corrosion resistance. 3. In the absence of local misorientation, refining grain size could improve the corrosion resistance of Mg.
Collapse
|
2
|
Effect of Deformation Structure and Annealing Temperature on Corrosion of Ultrafine-Grain Fe-Cr Alloy Prepared by Equal Channel Angular Pressing. INTERNATIONAL JOURNAL OF CORROSION 2018. [DOI: 10.1155/2018/4853175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The effect of the deformation structure and annealing temperature on the corrosion of ultrafine-grain (UFG) Fe-Cr alloys with 8 to 12% Cr prepared by equal channel angular pressing (ECAP) was investigated with particular emphasis on the stability of the passivation layer. Fe-Cr alloys were processed by ECAP using up to eight passes at 423 K by the Bc route, followed by annealing at temperatures of 473 to 1173 K for 1 h. Passivity appeared in all alloys as a result of ECAP, and the stability of the passivation layer was evaluated by anodic polarization measurements in a 1000 mol·m−3 NaCl solution. The stability of the passivation layer increased as the degree of deformation became more extensive with successive ECAP passes, and distinct escalation occurred with the formation of a UFG microstructure. In the early stages of annealing at moderate temperatures, the stability of the passivation layer deteriorated, although no visible grain growth occurred, and this effect increased monotonically with increasing annealing temperature. The high degree of stability of the passivation layer on UFG alloys following ECAP can be attributed to the large number of high-angle nonequilibrium grain boundaries, which may lead to Cr enrichment of the surface region. The deterioration of the passivation layer in the early stages of annealing may be attributed to a change in the grain boundaries to an equilibrium state. The present results show that the superiority of as-ECAPed materials of the Fe-Cr alloy to recovered ones by heat treatment can be achieved with 8–10% Cr as observed in 20% Cr.
Collapse
|
3
|
Vetterick GA, Gruber J, Suri PK, Baldwin JK, Kirk MA, Baldo P, Wang YQ, Misra A, Tucker GJ, Taheri ML. Achieving Radiation Tolerance through Non-Equilibrium Grain Boundary Structures. Sci Rep 2017; 7:12275. [PMID: 28947751 PMCID: PMC5612956 DOI: 10.1038/s41598-017-12407-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 08/31/2017] [Indexed: 11/25/2022] Open
Abstract
Many methods used to produce nanocrystalline (NC) materials leave behind non-equilibrium grain boundaries (GBs) containing excess free volume and higher energy than their equilibrium counterparts with identical 5 degrees of freedom. Since non-equilibrium GBs have increased amounts of both strain and free volume, these boundaries may act as more efficient sinks for the excess interstitials and vacancies produced in a material under irradiation as compared to equilibrium GBs. The relative sink strengths of equilibrium and non-equilibrium GBs were explored by comparing the behavior of annealed (equilibrium) and as-deposited (non-equilibrium) NC iron films on irradiation. These results were coupled with atomistic simulations to better reveal the underlying processes occurring on timescales too short to capture using in situ TEM. After irradiation, NC iron with non-equilibrium GBs contains both a smaller number density of defect clusters and a smaller average defect cluster size. Simulations showed that excess free volume contribute to a decreased survival rate of point defects in cascades occurring adjacent to the GB and that these boundaries undergo less dramatic changes in structure upon irradiation. These results suggest that non-equilibrium GBs act as more efficient sinks for defects and could be utilized to create more radiation tolerant materials in future.
Collapse
Affiliation(s)
- Gregory A Vetterick
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA
- TerraPower, LLC, Bellevue, WA, 98005, USA
| | - Jacob Gruber
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA
| | - Pranav K Suri
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA
| | - Jon K Baldwin
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Marquis A Kirk
- IVEM-Tandem Facility, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Pete Baldo
- IVEM-Tandem Facility, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Yong Q Wang
- Ion Beam Materials Laboratory, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Amit Misra
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Garritt J Tucker
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA
- Department of Mechanical Engineering, Colorado School of Mines, Golden, CO, 80401, USA
| | - Mitra L Taheri
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA.
| |
Collapse
|
4
|
Valiev RZ, Song C, McFadden SX, Mukherjee AK, Mishra RS. TEM/HREM observations of nanostructured superplastic Ni3AI. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/01418610108216615] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Van Swygenhoven H, Derlet P. Atomistic Simulations of Dislocations in FCC Metallic Nanocrystalline Materials. DISLOCATIONS IN SOLIDS 2008. [DOI: 10.1016/s1572-4859(07)00001-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
6
|
Abstract
Microstructure evolution and corrosion behaviour of ultrafine-grained copper processed by equal channel angular pressing (route Bc) were studied. The results of TEM investigation of the microstructure evolution are presented along with the measurements of the corrosion potential, the corrosion current density and the anodic current density for two aggressive media, viz. 3% NaCl and 1M H2SO4. An important finding and a good news is that the corrosion behaviour of ECAP copper is not inferior to and does not qualitatively differ from that of the coarse grained material. Moreover, it was shown by SEM investigation that the corrosion damage is more homogeneous in ultrafine grained ECAP processed copper than in its coarse grained counterpart.
Collapse
|
7
|
Abstract
A lot of works for developing the structural nano-materials have been performed all
over the world in recent years. Severe deformation techniques like HPT, ECPA and ARB have been applied to different materials such as Al, Cu, Ti and several steels. Such techniques greatly reduced the grain size and improved the yield and tensile strengths. However, the elongation of the materials is greatly decreased due to the small amount of work hardening, and these techniques do not seem suitable for the mass production. Therefore, this study has been carried out as a fundamental research for developing austenitic steels with high strength and good elongation using a conventional rolling and annealing processes. Fe-0.1%C-10%Cr-5%Ni-8%Mn alloy was melted, homogenized, hot rolled, and cold rolled at room temperature to transform γ austenite to α ’ martensite. After that, the specimens were annealed just above its reverse transformation finish temperature (Af) to obtain the fine reversed austenite grains. The grain size of the metastable austenitic steel was successfully refined to less than 200nm by repeating rolling and annealing processes. The resultant nanocrystalline material shows not only high strength but also large elongation because the work hardening ability is enhanced by the strain-induced martensitic transformation during the tensile test.
Collapse
|
8
|
Wu MS, He MD. Prediction of crack statistics in a random polycrystal damaged by the pile-ups of extrinsic grain-boundary dislocations. ACTA ACUST UNITED AC 1999. [DOI: 10.1080/01418619908210297] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
9
|
Gertsman VY, Janecek M, Tangri K. Grain boundary networks in AISI 316L stainless steel. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/pssa.2211570205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
10
|
Gertsman V, Tangri K. Computer simulation study of grain boundary and triple junction distributions in microstructures formed by multiple twinning. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0956-7151(94)00422-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
11
|
Gertsman VY, Birringer R, Valiev RZ. Structure and strength of submicrometer-grained copper. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/pssa.2211490117] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
12
|
Valiev R. Approach to nanostructured solids through the studies of submicron grained polycrystals. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0965-9773(95)00031-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
The study of grain size dependence of yield stress of copper for a wide grain size range. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0956-7151(94)90486-3] [Citation(s) in RCA: 168] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
14
|
|
15
|
Gertsman V, Tangri K, Valiev R. On the grain boundary statistics in metals and alloys susceptible to annealing twinning. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0956-7151(94)90004-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
On the structure and strength of ultrafine-grained copper produced by severe plastic deformation. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0956-716x(94)90045-0] [Citation(s) in RCA: 115] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Zelin MG, Mukherjee AK. Analysis of the cooperative grain boundary sliding in terms of cellular dislocations. ACTA ACUST UNITED AC 1993. [DOI: 10.1080/01418619308222926] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
18
|
Valiev RZ, Razumovskii IM, Sergeev VI. Diffusion along grain boundaries with non-equilibrium structure. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/pssa.2211390206] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
19
|
Languillaume J, Chmelik F, Kapelski G, Bordeaux F, Nazarov A, Canova G, Esling C, Valiev R, Baudelet B. Microstructures and hardness of ultrafine-grained Ni3Al. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0956-7151(93)90110-e] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
20
|
Nazarov A, Romanov A, Valiev R. On the structure, stress fields and energy of nonequilibrium grain boundaries. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0956-7151(93)90152-i] [Citation(s) in RCA: 242] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
21
|
Valiev R, Langdon T. An investigation of the role of intragranular dislocation strain in the superplastic Pb-62% Sn eutectic alloy. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0956-7151(93)90029-r] [Citation(s) in RCA: 136] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
22
|
Mulyukov KY, Khaphizov SB, Valiev RZ. Grain Boundaries and Saturation Magnetization in Submicron Grained Nickel. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/pssa.2211330228] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
23
|
|
24
|
On the spreading of grain boundary dislocations and its effect on grain boundary properties. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0956-7151(91)90158-w] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
25
|
Valiev RZ, Vishnyakov YD, Mulyukov RR, Fainshtein GS. On the Decrease of Curie Temperature in Submicron-Grained Nickel. ACTA ACUST UNITED AC 1990. [DOI: 10.1002/pssa.2211170226] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
26
|
Valiev RZ, Musalimov RS, Tsenev NK. The non-equilibrium state of grain boundaries and the grain boundary precipitations in aluminium alloys. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/pssa.2211150211] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
27
|
Valiev RZ, Sergeev VI, Khalikov AM, Shvetsova EV. The influence of grain boundaries on the kinetics of solid-phase reactions in a nickel-based superalloy. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf00720697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
28
|
The effect of small plastic deformation and annealing on the properties of polycrystals: Part II. Theoretical model for the transformation of nonequilibrium grain boundaries. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf02653928] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
29
|
Gastaldi J, Jourdan C, Grange G, Bauer CL. “In situ” determination of grain boundary migration rates by synchrotron white beam X-ray topography. ACTA ACUST UNITED AC 1988. [DOI: 10.1002/pssa.2211090205] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
30
|
Swiatnicki W, Grabski M. Effect of distribution of grain boundary diffusivity on plastic flow of austenitic steel I: Characterization of microstructure. Determining the distribution of grain boundary diffusivity. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0025-5416(88)90242-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
Lojkowski W, Wyrzykowski J. On the effect of dislocation spreading on grain boundary diffusion. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/s0036-9748(88)80298-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|