Competitive failure analysis on tensile fracture of laser-deposited material for martensitic stainless steel

Wei, Shaopeng1,2; Wang, Gang1,2; Yu, Jianchao1; Rong, Yiming2,3

2017-03-15

10.1016/j.matdes.2017.01.014

MATERIALS AND DESIGN   影响因子和分区

0264-1275

1873-4197

Sufficient mechanical properties of deposited materials are needed in remanufacturing applications to guarantee the functionality and reliability of repaired parts. The, present paper described the tensile fracture behavior of laser-deposited FV52OB martensitic stainless steel comprehensively based on evolution of the microstructure and mechanical property. The samples were fabricated by laser hot-wire deposition. The fracture behavior of the deposited samples was characterized using a specially designed uniaxial tension testing approach andinvestigated on the grain size, microhardness profile, residual stresses and precipitate distribution. The results show that the tensile fracture occurred at the position with high fluctuating microhardness caused by the multi-layer laser heating. Three tensile fracture patterns of deposited material were found: interfacial fracture, heat affected zone (HAZ) fracture and HAZ/interfac ehybrid fracture. They result from the competitive failure between microvoid coalescence in the heat affected zone and interfacial cracking in the clad layer/HAZ interface. Grain refinement and dissolution of precipitates occurred in heat affected zone, leading to a decrease of strength and increase of toughness. (C) 2017 Elsevier Ltd. All rights reserved.

Fracture behavior Uniaxial tensile Microstructure characterization Microhardness profile Laser hot-wire deposition Martensitic stainless steel

SCI ; EI

英语

其他

National Natural Science Foundation of China[U1537202]

Materials Science

Materials Science, Multidisciplinary

WOS:000394483900001

ELSEVIER SCI LTD

20170203243924

Characterization ; Corrosion ; Deposition ; Failure analysis ; Fracture mechanics ; Fracture testing ; Grain refinement ; Grain size and shape ; Heat affected zone ; Martensitic stainless steel ; Mechanical properties ; Microhardness ; Microstructure ; Precipitates ; Tensile testing

Welding:538.2 ; Steel:545.3 ; Chemical Operations:802.3 ; Mechanics:931.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China
2.Tsinghua Univ, Beijing Key Lab Precis, Ultraprecis Mfg Equipments & Control, Beijing 100084, Peoples R China
3.South Univ Sci & Technol China, Mech & Energy Engn Dept, Shenzhen 518055, Peoples R China

Wei, Shaopeng,Wang, Gang,Yu, Jianchao,et al. Competitive failure analysis on tensile fracture of laser-deposited material for martensitic stainless steel[J]. MATERIALS AND DESIGN,2017,118:1-10.

Wei, Shaopeng,Wang, Gang,Yu, Jianchao,&Rong, Yiming.(2017).Competitive failure analysis on tensile fracture of laser-deposited material for martensitic stainless steel.MATERIALS AND DESIGN,118,1-10.

Wei, Shaopeng,et al."Competitive failure analysis on tensile fracture of laser-deposited material for martensitic stainless steel".MATERIALS AND DESIGN 118(2017):1-10.