'Hall-Petch' type of relationship between the extent of intergranular corrosion and grain size in a Ni-based superalloy

被引：25

作者：

Kaithwas, C. K. ^{[1
]}

Bhuyan, P. ^{[1
]}

Pradhan, S. K. ^{[1
,2
]}

Mandal, Sumantra ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India

[2] Natl Met Lab, CSIR, Mat Engn Div, Jamshedpur 831007, Bihar, India

来源：

CORROSION SCIENCE | 2020年 / 175卷

关键词：

Superalloys; SEM; Polarization; Weight loss; Intergranular corrosion; BOUNDARY-CHARACTER-DISTRIBUTION; SENSITIZATION BEHAVIOR; CARBIDE PRECIPITATION; STAINLESS-STEEL; ALLOY; 600; ENGINEERED MICROSTRUCTURE; MECHANICAL-PROPERTIES; IMPROVED RESISTANCE; RESIDUAL STRAIN; EVOLUTION;

D O I：

10.1016/j.corsci.2020.108868

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work elucidates the individual implication of wide spectrum of grain size on degree of sensitization (DOS) and intergranular corrosion in alloy 600H. Experimental evidences suggest that both the sensitization and desensitization phenomena are significantly delayed in the coarse-grained specimens. This is attributable to the lower driving force available in the coarser grains for the diffusion of Cr from the grain to the boundary. Interestingly, a Hall-Petch type relation has been observed between DOS (as well as weight loss) and grain size in which both the DOS and weight loss varied inversely proportional to the (grain size)(1/4).

引用

页数：14

共 60 条

[1] On the role of residual strain in controlling sensitisation of twin-boundary engineered type 304 stainless steel [J].

Ahmedabadi, Parag M. ;

Kain, Vivekanand ;

Muralidhar, K. Venkata ;

Samajdar, I. .

JOURNAL OF NUCLEAR MATERIALS, 2013, 432 (1-3) :243-251

[2] Role of grain boundary nature and residual strain in controlling sensitisation of type 304 stainless steel [J].

Ahmedabadi, Parag M. ;

Kain, Vivekanand ;

Dangi, Bhupinder Kumar ;

Samajdar, I. .

CORROSION SCIENCE, 2013, 66 :242-255

[3]

[Anonymous], 2006, 12732 BS ISO

[4]

[Anonymous], 2015, CURRENT, V02

[5]

ASTM International, 1999, G108 ASTM INT

[6] Tracking the evolution of intergranular corrosion through twin-related domains in grain boundary networks [J].

Barr, Christopher M. ;

Thomas, Sebastian ;

Hart, James L. ;

Harlow, Wayne ;

Anber, Elaf ;

Taheri, Mitra L. .

NPJ MATERIALS DEGRADATION, 2018, 2 (01)

[7] Effects of strain and grain size on carbide precipitation and corrosion sensitization behavior in 304 stainless steel [J].

Beltran, R ;

Maldonado, JG ;

Murr, LE ;

Fisher, WW .

ACTA MATERIALIA, 1997, 45 (10) :4351-4360

[8] Evaluating the efficiency of grain boundary serrations in attenuating high-temperature hot corrosion degradation in Alloy 617 [J].

Bhuyan, P. ;

Pradhan, S. K. ;

Mitra, R. ;

Mandel, S. .

CORROSION SCIENCE, 2019, 149 :164-177

[9] STRUCTURE OF HIGH-ANGLE GRAIN BOUNDARIES [J].

BRANDON, DG .

ACTA METALLURGICA, 1966, 14 (11) :1479-&

[10]

Chan W.K., 2010, J LASER APPL, V806, P1

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