Preparation and Welding Performance of Ti–6Al–4V Powder Compact Fabricated by Hot Isostatic Pressing

2016 ◽  
Vol 849 ◽  
pp. 760-765 ◽  
Author(s):  
Rui Peng Guo ◽  
Lei Xu ◽  
Jie Wu ◽  
Zheng Guan Lu ◽  
Rui Yang
Keyword(s):  
Electron Beam Welding ◽  
Welded Joint ◽  
Hot Isostatic Pressing ◽  
Butt Joint ◽  
Alloyed Powder ◽  
Practical Application ◽  
Isostatic Pressing ◽  
Properties Of Materials ◽  
Microstructural Design ◽  
Welding Properties

Powder metallurgy (P/M) Ti–6Al–4V alloy was produced by hot isostatic pressing from pre-alloyed powder in the present investigation. Electron beam welding (EBW) was used for butt joint of P/M Ti–6Al–4V sheets. Microstructure and tensile properties of P/M Ti–6Al–4V welded joint were studied. The results showed that the microstructure of the welded joint had a significant change due to the rapid cooling rate during the EBW process. The microhardness of the fusion zone was higher than that of other areas due to the occurrence of α' martensitic phase. The joint performance (tensile strength) was equal to that of weld matrix, and all of the tensile specimens failed in the base metal. For practical application of P/M Ti-based alloys, the ductility, strength and welding properties of materials could be optimized by proper microstructural design.

scholarly journals Study on Microstructure and Mechanical Properties of Powder Metallurgy TA15 Titanium Alloy

2020 ◽  
Vol 321 ◽  
pp. 11057
Author(s):  
Zhiyong Zhang ◽  
Yafei Ren ◽  
Kun Shi ◽  
Hongyu Liu ◽  
Shibing Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Isostatic Pressing ◽  
Alloyed Powder ◽  
Isostatic Pressing ◽  
Forming Technology ◽  
Ta15 Titanium Alloy ◽  
Electrode Method ◽  
Equiaxed Grains ◽  
Ta15 Alloy ◽  
Hip Process

TA15 pre-alloyed powder chosen in this paper is made by plasma rotating electrode method. The powders were used to prepare fully dense TA15 alloy ingots by the means of hot isostatic pressing(HIP) forming technology. The optimum parameter of the HIP process is 900°C /120MPa/3h. After the process of hot isostatic pressing, the powders were pressed into a fully dense ingot. An optital microscope was used to observe the microstructure of the ingot specimen and its formation mechanism was analysized. The microstructure of the TA15 alloy prepared by hot isostatic pressing of pre-alloyed powder is composed of fine α-equiaxed grains along lamellar colony boundaries. The mechanical properties exceed that of the casting level, which is close to the forging level. A typical TA15 alloy component was finally produced by HIP-PM process.

Nuclear Pressure Vessel Manufacture Using the Hot Isostatic Pressing (HIP) Process

2020 ◽  
Author(s):  
John Sulley ◽  
Phil Wallace ◽  
Ted Warner ◽  
Gary Jones
Keyword(s):  
Lead Time ◽  
Nuclear Power ◽  
Electron Beam Welding ◽  
Critical Path ◽  
Hot Isostatic Pressing ◽  
Pressure Vessels ◽  
Parent Material ◽  
Nuclear Plant ◽  
Isostatic Pressing ◽  
Hip Process

Abstract Hot Isostatic Pressing (HIPing) has been used by Rolls-Royce to successfully manufacture nuclear plant components such as valves, piping, and pump casings; the majority of these components being manufactured from stainless steels, typically 316L. There are also considered to be potentially significant benefits to be gained by manufacturing large nuclear plant pressure vessels via the HIP process, such vessels commonly being manufactured from Low Alloy Steel (LAS) materials such as ASME SA-508. The benefits would include cost and lead-time reductions, which are particularly pertinent in relation to the competiveness of the power generation market and future nuclear power plant construction. Such vessels are a major cost and are critical path items of the primary plant. Also, material quality improvements and improved inspectability are possible via the HIP process. Welding vessel sections together using Thick-Section Electron Beam Welding (TSEBW) shows significant promise in reducing welding time and the provision of high quality welds, further reducing vessel cost and lead-time. There is also the potential with the use of TSEBW, to reduce weld inspection requirements with the weld being effectively the same as the parent material, i.e. no weld filler material is used. This paper presents an overview of the pioneering work conducted and planned by Rolls-Royce to develop a method of manufacture to combine HIPing and TSEBW to produce nuclear plant pressure vessels. Staged development is covered, starting with small billet manufacture for the purposes of material testing and examination, followed by vessel demonstrators for the purposes of proving the method of manufacture and to provide justification data, e.g. examination, pressure and thermal cyclic test data. In order to provide a balanced perspective, the paper also identifies the key challenges — risks, and capability development requirements necessary to deliver this method of manufacture.

scholarly journals The Practical Application by Hot Isostatic Pressing Process.

1996 ◽  
Vol 65 (8) ◽  
pp. 628-632
Author(s):  
Satoru Asai ◽  
Junichi Shibuya ◽  
Masashi Takahashi
Keyword(s):  
Hot Isostatic Pressing ◽  
Practical Application ◽  
Isostatic Pressing ◽  
Pressing Process

scholarly journals Weldability of 9Cr-ODS and JLF-1 Steels for Dissimilar Joining with Hot Isostatic Pressing and Electron Beam Welding

2015 ◽  
Vol 10 (0) ◽  
pp. 3405015-3405015 ◽  
Author(s):  
Haiying FU ◽  
Takuya NAGASAKA ◽  
Takeo MUROGA ◽  
Wenhai GUAN ◽  
Shuhei NOGAMI ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Welding ◽  
Hot Isostatic Pressing ◽  
Isostatic Pressing ◽  
Dissimilar Joining

Microstructure and Mechanical Properties of Powder Metallurgy Ti-22Al-24Nb-0.5Mo Alloys Joints with Electron Beam Welding

2016 ◽  
Vol 849 ◽  
pp. 321-326
Author(s):  
Jie Wu ◽  
Lei Xu ◽  
Rui Peng Guo ◽  
Zheng Guan Lu ◽  
Yu You Cui ◽  
...  
Keyword(s):  
Electron Beam ◽  
Powder Metallurgy ◽  
Electron Beam Welding ◽  
Base Alloy ◽  
Hot Isostatic Pressing ◽  
Gas Atomization ◽  
Alloyed Powder ◽  
Uniform Microstructure ◽  
Joint Quality ◽  
Dense Powder

In this work, a Ti2AlNb based intermetallic alloy with the composition of Ti–22Al–24Nb–0.5Mo (at. %) pre-alloyed powder was firstly produced by gas atomization, and then fully dense powder metallurgy (PM) Ti2AlNb alloy was prepared by a hot isostatic pressing (HIPing) procedure. The HIPed alloy shows uniform microstructure with low number of porosities. In order to broaden the application field of PM Ti2AlNb alloys, electron beam welding (EBW) was proposed to join the intermetallics. The joint quality, microstructure and microhardness of PM Ti2AlNb alloy processed by EBW were characterized, and the results showed that the both base alloy and EBW joints have high metallurgy quality.

Tailored Microstructure and Properties through Powder Metallurgy and Hot Isostatic Pressing

1991 ◽  
Vol 251 ◽  
Author(s):  
Louis Buekenhout
Keyword(s):  
Powder Metallurgy ◽  
Hot Isostatic Pressing ◽  
Isostatic Pressing ◽  
Microstructure And Properties ◽  
Complex Shapes ◽  
Properties Of Materials ◽  
Elaboration Process

It is a very well known fact that there exists a narrow relationship between the structure and the properties of materials.Structure can be modified by changing the composition of the material and for a selected composition by adapting its elaboration process. Powder metallurgy (P/M) and hot isostatic pressing (HIP) can be part of the elaboration process and permit to realize mono or multi-materials with or without complex shapes which can eventually be characterized by specific properties which are not possible to be obtained through the conventional metallurgy road.The objective of this presentation is to illustrate this through a few examples.

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