Investigating the effect of process parameters on weld pool thermal history and mechanical properties of laser welded Inconel 625 and Duplex stainless steel 2205 dissimilar welds

被引：21

作者：

Ahmad, Gulshad Nawaz ^{[1
]}

Raza, Mohammad Shahid ^{[2
]}

Singh, N. K. ^{[1
]}

Muvvala, Gopinath ^{[3
]}

机构：

[1] Indian Inst Technol ISM Dhanbad, Dept Mech Engn, Dhanbad 826004, Bihar, India

[2] Indian Inst Technol Kharagpur, Dept Mech Engn, Kharagpur, W Bengal, India

[3] Indian Inst Technol Hyderabad, Dept Mech & Aerosp Engn, Hyderabad, India

来源：

OPTIK | 2021年 / 248卷

关键词：

laser welding; molten weld-pool thermal history; cooling rate; microstructure; tensile strength; TENSILE-STRENGTH; LAVES PHASE; MICROSTRUCTURE; SOLIDIFICATION; BEHAVIOR; MICROSEGREGATION; WELDMENTS; TOUGHNESS; SHEETS;

D O I：

10.1016/j.ijleo.2021.168134

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In present study, welding of Inconel 625 and 2205 grade duplex stainless steel (DSS 2205) was carried out using a 2 kW Yb-fiber laser. An infrared (IR) pyrometer was used to log the thermal history of the weld pool. The molten weld-pool lifetime and cooling rates were accessed through the recorded data, and their effect on microstructure, elemental segregation, hardness and tensile properties of welded joints was investigated. The weld bead was composed of columnar and equiaxed dendritic grains. The microstructure exhibited refinement with increase in cooling rate, reducing the micro-segregation of Molybdenum (Mo) and Niobium (Nb) in the inter-dendritic spacing which was further investigated through XRD analysis. Also, tensile strength was found to be maximum i.e., 896.4 +/- 8.1 MPa in the samples welded at 1950 W, 5500 mm/min which exhibited the fastest cooling within the range of parameters selected.

引用

页数：11

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