scholarly journals EXPERIMENTAL INVESTIGATION OF WELD JOINTS BETWEEN SINTERED NB MODIFIED HK30 STAINLESS STEEL AND WROUGHT/CAST STAINLESS STEELS

2021 ◽  
Vol 9 (11) ◽  
pp. 80-84
Author(s):  
Samir Butkovic ◽  
◽  
Emir Saric ◽  
Keyword(s):  
Stainless Steel ◽  
Powder Metallurgy ◽  
Base Material ◽  
Dissimilar Materials ◽  
304 Stainless Steel ◽  
Materials Properties ◽  
Weld Joints ◽  
Sintering Conditions ◽  
Manufacturing Technologies ◽  
Microstructural Examination

Very important property of powder metallurgy parts is ability to join to components produced by different manufacturing technologies or dissimilar materials. Properties of powder metallurgy Nb modified HK30 components are highly influenced by conditions applied during sintering. Weldability of sintered components can be improved using favorable sintering conditions. In this regard, effect of sintering parameters on fusion weldability of Nb modified HK30 is presented in this paper. Investigation of weld joints between HK30, produced by different sintering conditions, and cast HK30 stainless steel is performed. In addition, examination of welds between sintered HK30 and wrought 304 stainless steel is also performed. Microstructural examination and hardness testing of fusion zones and heat affected zones were done for different combinations of base material.

Failure of weld joints between carbon steel pipe and 304 stainless steel elbows

2005 ◽  
Vol 12 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Anwar Ul-Hamid ◽  
Hani M. Tawancy ◽  
Nureddin M. Abbas
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Steel Pipe ◽  
304 Stainless Steel ◽  
Weld Joints

Effect of Process Parameters on Friction Stir Lap Welded 304 Stainless Steel and 5052 Aluminium Alloys

2020 ◽  
Author(s):  
Veerendra Chitturi ◽  
Srinivasa Rao Pedapati ◽  
Mokhtar Awang
Keyword(s):  
Stainless Steel ◽  
Penetration Depth ◽  
Process Parameters ◽  
Intermetallic Layer ◽  
Microstructural Analysis ◽  
Weld Zone ◽  
Chemical Properties ◽  
Dissimilar Materials ◽  
304 Stainless Steel ◽  
Friction Stir

Abstract Joining of two different materials like aluminium and steel is a challenging task because of the vast differences in their physical, mechanical and chemical properties. Friction stir welding is a solid-state joining technique which is successful in joining dissimilar materials. In this study, the tool made with Tungsten-Rhenium with a pin length of 4.1 mm is used to weld 4 mm stainless steel and 2 mm aluminium plates in lap configuration with steel as the top plate. The process parameters used in the study are tool rotational speeds between 800 rpm and 1200 rpm, traverse speed ranging from 20 mm/min to 40 mm/min, penetration depth of 4.1 mm to 4.3 mm with a varying tilt between from 0° and 2.5°. The Aluminium is melted during the process because of the high temperature and is thrown out in the form of flash resulting in the formation of defects and a cup like structure at the weld zone. Microstructural analysis confirmed that formation of a sound joint without defects was impossible. The mechanically stirred zone consists of a thin intermetallic layer at the interface of aluminium and steel plates. The thickness of the intermetallic layers formed were between 5 μm and 20 μm. The maximum shear strength of 2.7 kN was achieved with tool rotational speed of 1000 rpm, penetration depth of 4.3 mm and welding speed of 30 mm/min when the angle was tilted at 0°. It is evident from the experiments that the joints achieved were not defect free because of improper mixing of the material.

scholarly journals Microstructure and Interfacial Reactions of Resistance Brazed Lap Joints between TC4 Titanium Alloy and 304 Stainless Steel Using Metal Powder Interlayers

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 180
Author(s):  
Pengxian Zhang ◽  
Zhizhong Fang ◽  
Shilong Li
Keyword(s):  
Stainless Steel ◽  
Titanium Alloy ◽  
Metal Powder ◽  
Base Material ◽  
Reaction Model ◽  
Lap Joints ◽  
304 Stainless Steel ◽  
Powder Layer ◽  
Zone Structure ◽  
Tc4 Titanium Alloy

In the brazing joint between titanium alloy and stainless steel, a lot of Fe-Ti intermetallic compounds (IMCs) can be easily formed to make joints crack. A lap resistance brazing process with metal powder layers on both sides of the filler metal was used to solve this problem. The microstructure and metallurgical behavior of joints was studied through comparative experiments. The result showed that Nb, V and Cr powders and the solder reacted with the base material to form a new phase, which replaced the Ti-Fe brittle phase in the joint. At the same time, metal powder clusters hindered the diffusion of Ti and Fe elements and improved the distribution of new phases. The established atomic reaction model revealed the metallurgical behavior and formation mechanism of the joints. Therefore, the intervening position of the metal powder layer and the multi-reaction zone structure are the main reasons the shear strength of joints is improved.

Comparison of Recovery and Recrystallization in Stainless Steel Following Plane-Wave Shock Loading and Explosive Forming

1970 ◽  
Vol 28 ◽  
pp. 428-429 ◽  
Author(s):  
J. A. Korbonski ◽  
L. E. Murr
Keyword(s):  
Stainless Steel ◽  
Shock Loading ◽  
Pressure Pulse ◽  
Shock Pressure ◽  
304 Stainless Steel ◽  
Strain Rates ◽  
Two Dimensional ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Explosive Forming

Comparison of recovery rates in materials deformed by a unidimensional and two dimensional strains at strain rates in excess of 104 sec.−1 was performed on AISI 304 Stainless Steel. A number of unidirectionally strained foil samples were deformed by shock waves at graduated pressure levels as described by Murr and Grace. The two dimensionally strained foil samples were obtained from radially expanded cylinders by a constant shock pressure pulse and graduated strain as described by Foitz, et al.

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