scholarly journals Study of the properties of low-cost powder metallurgy titanium alloys by 430 stainless steel addition

2014 ◽  
Vol 60 ◽  
pp. 628-636 ◽  
Author(s):  
L. Bolzoni ◽  
E. Herraiz ◽  
E.M. Ruiz-Navas ◽  
E. Gordo
Keyword(s):  
Stainless Steel ◽  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Low Cost ◽  
430 Stainless Steel

Fracture Toughness of Powder Metallurgy and Ingot Titanium Alloys – A Review

2013 ◽  
Vol 551 ◽  
pp. 143-160 ◽  
Author(s):  
Ajit Pal Singh ◽  
Brian Gabbitas ◽  
De Liang Zhang
Keyword(s):  
Fracture Toughness ◽  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Alloy Composition ◽  
Low Cost ◽  
Ingot Metallurgy ◽  
Metal Powders ◽  
Critical Factors ◽  
Microstructural Characteristics ◽  
High Degree

Powder metallurgy (PM) is potentially capable of producing homogeneous titanium alloys at relative low cost compared to ingot metallurgy (IM). There are many established PM methods for consolidating metal powders to near net shapes with a high degree of freedom in alloy composition and resulting microstructural characteristics. The mechanical properties of titanium and its alloys processed using a powder metallurgical route have been studied in great detail; one major concern is that ductility and toughness of materials produced by a PM route are often lower than those of corresponding IM materials. The aim of this paper is to review the fracture toughness of both PM and IM titanium alloys. The effects of critical factors such as interstitial impurities, microstructural features and heat treatment on fracture toughness are also discussed

scholarly journals A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
De-feng Mo ◽  
Ting-feng Song ◽  
Yong-jian Fang ◽  
Xiao-song Jiang ◽  
Charles Q. Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Stainless Steels ◽  
Diffusion Bonding ◽  
Low Cost ◽  
Phase Interface ◽  
Intermetallic Phases ◽  
Voids Growth

High-quality joints between titanium alloys and stainless steels have found applications for nuclear, petrochemical, cryogenic, and aerospace industries due to their relatively low cost, lightweight, high corrosion resistance, and appreciable mechanical properties. This article reviews diffusion bonding between titanium alloys and stainless steels with or without interlayers. For diffusion bonding of a titanium alloy and a stainless steel without an interlayer, the optimized temperature is in the range of 800–950°C for a period of 60–120 min. Sound joint can be obtained, but brittle FeTi and Fe-Cr-Ti phases are formed at the interface. The development process of a joint mainly includes three steps: matching surface closure, growth of brittle intermetallic compounds, and formation of the Kirkendall voids. Growth kinetics of interfacial phases needs further clarification in terms of growth velocity of the reacting layer, moving speed of the phase interface, and the order for a new phase appears. The influence of Cu, Ni (or nickel alloy), and Ag interlayers on the microstructures and mechanical properties of the joints is systematically summarized. The content of FeTi and Fe-Cr-Ti phases at the interface can be declined significantly by the addition of an interlayer. Application of multi-interlayer well prevents the formation of intermetallic phases by forming solid solution at the interface, and parameters can be predicted by using a parabolic diffusion law. The selection of multi-interlayer was done based on two principles: no formation of brittle intermetallic phases and transitional physical properties between titanium alloy and stainless steel.

Development of Stainless Steel (SS316L) Foam with Different Composition Using Compaction Method

2015 ◽  
Vol 1087 ◽  
pp. 86-90 ◽  
Author(s):  
Murni Faridah Mahammad Rafter ◽  
Sufizar Ahmad ◽  
Rosdi Ibrahim ◽  
Rosniza Hussin ◽  
H.M. Taib
Keyword(s):  
Stainless Steel ◽  
Powder Metallurgy ◽  
Low Cost ◽  
Size Control ◽  
Medium Size ◽  
Sintering Process ◽  
Font Size ◽  
Porous Metals ◽  
X Ray ◽  
Compaction Method

<span><span style="font-family: Times New Roman; font-size: medium;" face="Times New Roman" size="3"> </span> <p><span style="font-size: medium;" size="3"><span style="font-family: Times New Roman;" face="Times New Roman">Powder metallurgy stainless steels are retains unique benefits in preparation of porous metals due to its low cost, better wear, precise size control and corrosion resistance which are significant quality displays. In this study, the fabrication of open cellular stainless steel (SS316L) foams by using a crystalline sugar via compaction method was investigated. In this work, we show a promising method of SS316L preparation with crystalline sugar as space holder particles. Then, the foams will be given to consider the properties of SS316L foam after sintering process. Powder metallurgy process needs to go through the mixing, pressing, sintering and analysis. The selected composition of SS316L was 50 wt % and 55 wt % SS316L while the remaining percentages are foaming agent or binder. Then, sintering process was conducted in the tube furnace. The SS316L foams were characterised using X-Ray Diffraction (XRD) and Energy Diffraction X-ray (EDX). The results of this study indicate that, the XRD was detected Austenite stainless steel. Then, the detected elements in the SS316L foam were O, K, Mn, Cr, Fe, Mo and Al.</span></span></p> <span style="font-family: Times New Roman; font-size: medium;" face="Times New Roman" size="3"> </span>

scholarly journals Understanding the properties of low-cost iron-containing powder metallurgy titanium alloys

2016 ◽  
Vol 110 ◽  
pp. 317-323 ◽  
Author(s):  
L. Bolzoni ◽  
E.M. Ruiz-Navas ◽  
E. Gordo
Keyword(s):  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Low Cost

scholarly journals Quantifying the properties of low-cost powder metallurgy titanium alloys

2017 ◽  
Vol 687 ◽  
pp. 47-53 ◽  
Author(s):  
L. Bolzoni ◽  
E.M. Ruiz-Navas ◽  
E. Gordo
Keyword(s):  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Low Cost

Interstitial Control in Titanium Alloys Produced by Powder Metallurgy

2010 ◽  
Vol 660-661 ◽  
pp. 3-10 ◽  
Author(s):  
Vinicius André Rodrigues Henriques ◽  
S.L.G. Petroni ◽  
M.S.M. Paula ◽  
Carlos Alberto Alves Cairo ◽  
Eduardo T. Galvani
Keyword(s):  
Powder Metallurgy ◽  
Titanium Alloys ◽  
High Performance ◽  
Low Cost ◽  
Cold Isostatic Pressing ◽  
Mechanical Resistance ◽  
Aerospace Applications ◽  
Surgical Implants ◽  
Critical Issues ◽  
Interstitial Elements

The titanium alloys are used for applications that demand high performance, including surgical implants and aerospace applications. Powder metallurgy is an advantageous alternative for titanium parts production with complex geometries at a relative low cost. Despite that, it is verified that the introduction of interstitial elements (oxygen, nitrogen and carbon) wile processing these alloys, though can increase hardness and mechanical resistance, which is frequently related to the reduction of ductility and fragility increase. The objective of this work is to investigate the influence of the interstitial elements in commercially pure Ti and Ti-13Nb-13Zr alloy produced by powder metallurgy (P/M). Samples were produced by the mixing of hydrided metallic powders followed by uniaxial and cold isostatic pressing with subsequent densification by sintering at 1400 °C, in vacuum. Sintered samples were characterized for phase composition, microstructure and microhardness by X-ray diffraction, scanning electron microscopy and Vickers indentation, respectively. The interstitial content was analyzed by Leco equipment. It was shown that the samples were sintered to high densities with a Widmanstatten microstructure. The oxygen and nitrogen contents are above the ELI (Extra Low Interstitial) and the critical issues were identified in the original blended elemental route.

scholarly journals Synthesis, Surface Nitriding and Characterization of Ti-Nb Modified 316L Stainless Steel Alloy Using Powder Metallurgy

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3270
Author(s):  
Sadaqat Ali ◽  
Muhammad Irfan ◽  
Usama Muhammad Niazi ◽  
Ahmad Majdi Abdul Rani ◽  
Imran Shah ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
316L Stainless Steel ◽  
Artificial Saliva ◽  
Low Cost ◽  
Fibroblast Cell ◽  
Nitride Layer ◽  
Processing Technique ◽  
Steel Matrix

The powder metallurgy (PM) technique has been widely used for producing different alloy compositions by the addition of suitable reinforcements. PM is also capable of producing desireable mechanical and physical properties of the material by varying process parameters. This research investigates the addition of titanium and niobium in a 316L stainless steel matrix for potential use in the biomedical field. The increase of sintering dwell time resulted in simultaneous sintering and surface nitriding of compositions, using nitrogen as the sintering atmosphere. The developed alloy compositions were characterized using OM, FESEM, XRD and XPS techniques for quantification of the surface nitride layer and the nitrogen absorbed during sintering. The corrosion resistance and cytotoxicity assessments of the developed compositions were carried out in artificial saliva solution and human oral fibroblast cell culture, respectively. The results indicated that the nitride layer produced during sintering increased the corrosion resistance of the alloy and the developed compositions are non-cytotoxic. This newly developed alloy composition and processing technique is expected to provide a low-cost solution to implant manufacturing.

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