Inertia Welded Jet Engine Components

1971 ◽  
Author(s):  
K. W. Stalker ◽  
L. P. Jahnke
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Titanium Alloys ◽  
Jet Engine ◽  
Mechanical Joints ◽  
Material Utilization ◽  
The Cost ◽  
Engine Components ◽  
Solid State Joining ◽  
Joining Process

The fabrication of jet engine rotors by joining simple disk and ring shapes offers both weight and cost advantages; however, the metal joints must have excellent and completely reproducible mechanical properties. Inertia welding achieves this since it is a solid state joining process which forges the two parts together under an automatically controlled situation. The parameters for inertia welding jet engine nickel and titanium alloys are discussed. The cost and weight advantages occurring from elimination of mechanical joints and better material utilization are identified. Several typical applications are described.

Influence of Process Parameter on Microstructural Characteristics and Tensile Properties of Friction Welded ASS304L Alloy

2015 ◽  
Vol 766-767 ◽  
pp. 745-750 ◽  
Author(s):  
K. Umanath ◽  
K. Palanikumar
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Stainless Steels ◽  
Friction Welding ◽  
Welding Process ◽  
Austenitic Stainless Steels ◽  
Microstructural Characteristics ◽  
Solid State Joining ◽  
Joining Process ◽  
Rotary Type

The rotary type continuous friction welding process is a solid state joining process by mechanically. It produces a joint in the forging pressure contact with rotating and motionless workpiece. The solid state joining process it produces welds with reduced distortion and improved mechanical properties. The austenitic stainless steels are widely used in shipbuilding field, nuclear field and automobile field because of their special mechanical and metallurgical properties. In this work, friction welding of austenitic stainless steel rods of 10mm diameter was investigated with an aim to understand the influence of friction welding process parameters. The details of microstructure analysis using optical microscopy are discussed.

Investigation of Microstructure and Mechanical Properties of Semi-Solid State Joining of SSM Aluminum Alloys

2014 ◽  
Vol 496-500 ◽  
pp. 371-375 ◽  
Author(s):  
Apirit Petkhwan ◽  
Prapas Muangjunburee ◽  
Jessada Wannasin
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Weld Metal ◽  
Butt Joint ◽  
A356 Aluminum Alloy ◽  
Globular Microstructure ◽  
Microstructure And Mechanical Properties ◽  
A356 Aluminum ◽  
Semi Solid ◽  
Solid State Joining

In this research, the semi-solid state joining of SSM A356 aluminum alloy was investigated. The butt-joint of SSM A356 was heated by an induction heating coil to create a localized semisolid pool. Then a stirrer was applied into the joint seam in order to mix the weld metal. The accurate controlling of temperature during joining was measured. The effects of stirring rate on physical, macrostructure, microstructure and mechanical properties were studied. Experimental results showed that increase in stirring rates, the surface of the joint was smooth. The weld metal consisted of the globular microstructure and also voids. The density of weld metal zone increased by an appropriate stirring. The best tensile strength was achieved with 1750 rpm, 70 mm/min for 103.4 MPa.

scholarly journals Solid State Joining Process

2009 ◽  
Vol 78 (5) ◽  
pp. 431-435
Author(s):  
Masakatsu MAEDA ◽  
Masanori YASUYAMA ◽  
Masaaki KIMURA
Keyword(s):  
Solid State ◽  
Solid State Joining ◽  
Joining Process

Solid-state joining of aluminum to titanium: A review

2021 ◽  
pp. 146442072110108
Author(s):  
Vijay S Gadakh ◽  
Vishvesh J Badheka ◽  
Amrut S Mulay
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Titanium Alloys ◽  
Intermetallic Compounds ◽  
Welding Process ◽  
High Strength ◽  
Weld Interface ◽  
Fusion Welding ◽  
Cp Ti ◽  
Welding Processes

The dissimilar material joining of aluminum and titanium alloys is recognized as a challenge due to the significant differences in the physical, chemical, and metallurgical properties of these alloys, where the increasing demands for high strength and lightweight alloys in aerospace, defense, and automotive industries. Joining these two alloys using the conventional fusion techniques produces commercially unacceptable sound joints due to irregular, complex weld pool shapes, cracking and low strength, high residual stresses, cracks, and microporosity, and the brittle intermetallic compounds formation leads to poor formability or inferior mechanical properties. The formation of intermetallic compounds is inevitable but it is less severe in solid-state than in the fusion welding process. Hence, this article reviews on aluminum–titanium joining using different solid-state and hybrid joining processes with emphasis on the effect of process parameters of the different processes on the weld microstructure, mechanical properties along with the type of intermetallic compounds and defects formed at the weld interface. Among the various solid-state welding processes for aluminum–titanium joining, the following grades of aluminum and titanium alloys were employed such as cp Ti, Ti6Al4V, cp Al, AA1xxx, AA 2xxx, AA5xxx, AA6xxx, AA7xxx, out of which Ti6Al4V and AA6xxx alloys are the most common combination.

A Weld that Lasts for 100,000 Years: Friction Stir Welding of Copper Canisters

2003 ◽  
Vol 807 ◽  
Author(s):  
Lars Cederqvist
Keyword(s):  
Friction Stir Welding ◽  
Solid State ◽  
Aluminium Alloys ◽  
Development Program ◽  
Production Level ◽  
Friction Stir ◽  
Solid State Joining ◽  
Joining Process ◽  
New Machine

ABSTRACTFriction Stir Welding (FSW) is a novel solid-state joining process where the work pieces are joined together using a rotating non-consumable tool. The process has mainly been used for joining aluminium alloys, and has not yet been used in production for any other metal. However, the results from the development program confirm that FSW can consistently seal 50mm thick copper canisters without creating defects. A new machine is now installed at SKB's Canister Laboratory to further automate the process to production level.

Mechanical Properties Improvement of Semi-Solid State Joining of Aluminum Alloys SSM A356

2015 ◽  
Vol 658 ◽  
pp. 146-150 ◽  
Author(s):  
Atsadawoot Geaowdee ◽  
Prapas Muangjunburee
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Aluminum Alloys ◽  
Welding Speed ◽  
Rotation Speed ◽  
Shielding Gas ◽  
Globular Structure ◽  
A356 Aluminum ◽  
Semi Solid ◽  
Solid State Joining

The aim of this research was to study semi-solid state joining of SSM A356 aluminum alloys which welded at its semi-solid state temperature by using oxygen – acetylene heat source. Then a stirrer was used to stir the weld seam. The joining parameters were rotation speed 1,110 with welding speed 120 mm/min and rotation speed 1,320 rpm with welding speed 160 mm/min. The joining temperatures were 575-590 and 590-610 oC. Joining was performed under nitrogen shielding gas and under argon shielding gas. Physical appearance, macrostructure, microstructure and mechanical properties were analyzed. The results indicated that the weld’s microstructure consisted of globular structure. In addition, porosities were found at the top of weld. However, minimum porosities were obtained from joints under argon shielding gas. The highest tensile strength was achieved from rotation speed at 1,110 rpm with welding speed at 120 mm/min under argon shielding gas with the value of 173 MPa. The joint efficiency was 86 % compared to the base metal.

Microstructural Factors Governing Mechanical Properties in Friction Stir Welds

2007 ◽  
Vol 345-346 ◽  
pp. 1493-1496 ◽  
Author(s):  
Yutaka S. Sato ◽  
Hiroyuki Kokawa
Keyword(s):  
Mechanical Properties ◽  
High Reliability ◽  
Local Region ◽  
Frictional Heat ◽  
Hardness Profile ◽  
Friction Stir ◽  
Precise Understanding ◽  
Weld Properties ◽  
Solid State Joining ◽  
Joining Process

Friction stir welding (FSW) is a solid-state joining process. During FSW, microstructure drastically changes in local region of the workpiece by introduction of frictional heat and severe plastic deformation arising from rotation of the welding tool, which results in inhomogeneous microstructural distribution in the welds. To maintain high reliability of the structure produced by FSW, precise understanding of microstructural factors governing weld properties is required. In the present paper, microstructural factors governing mechanical properties, especially hardness profile and tensile properties, of friction stir welded Al and Mg alloys are reviewed.

Comparison of Technological Properties of Sheet Titanium Alloys VT6 and VST2k

2020 ◽  
Vol 306 ◽  
pp. 33-41
Author(s):  
Rinat Safiullin ◽  
Svetlana Malysheva ◽  
Rafail Galeyev ◽  
Minnaul Mukhametrakhimov ◽  
Arthur Safiullin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Solid State ◽  
Titanium Alloys ◽  
Low Temperatures ◽  
Superplastic Forming ◽  
Technological Properties ◽  
Hollow Structures ◽  
Superplastic Properties ◽  
Processing Properties

The manuscript considers microstructure, mechanical and processing properties (formability and solid state weldability) of sheet titanium alloy VT6(Ti-6Al-4V) with improved superplastic properties production of JSC «VSMPO-AVISMA Corporation" for the process of superplastic forming at low temperatures and new experimental cheaper sheet titanium alloy VST2k. Complex studies of microstructure, mechanical properties, formability and weldability in the solid state of these titanium alloys were carried out. Studies have shown that both alloys in the temperature range 750-850oC have good weldability in the solid state and exhibit good superplastic properties. Technological properties of the alloy VST2k almost as good as the properties of the alloy VT6. This makes it possible to recommend the sheet alloy VST2k along with the alloy VT6 for the manufacture of hollow structures by SPF/DB in low-temperature superplasticity.

Application of Solid State Joining Technologies in Aerospace Parts

2020 ◽  
Vol 837 ◽  
pp. 69-73
Author(s):  
Ho Sung Lee ◽  
Jong Hoon Yoon ◽  
Joon Tae Yoo
Keyword(s):  
Solid State ◽  
Diffusion Bonding ◽  
Plastic Material ◽  
Welding Process ◽  
Bonding Process ◽  
Fusion Welding ◽  
Frictional Heat ◽  
Friction Stir ◽  
Solid State Joining ◽  
Joining Process

This study presents manufacturing lightweight aerospace components by solid state joining technologies. The advantages of solid state joining are due to the lack of hot cracking from solidification, since there is no liquid phase involved in joining process. This produces a high quality joint as compared to that from conventional fusion welding process. In diffusion bonding process, two different surfaces are matched together at elevated temperature under a low pressure without macroscopic plastic deformation in the interface. In friction stir welding process, the rotating shoulder of the tool generates frictional heat on the surface. As the pin rotates it forces the plastic material to mix mechanically in the vicinity of the pin and produces a heavily deformed microstructure around the pin. In this study, solid state joining processes of diffusion bonding and friction welding, are applied to manufacture several launcher components with lightweight, efficient and cost saving.

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