Effect of Heat Treatment on Microstructure and Mechanical Properties of 15-5 pH Stainless Steel for Fastener Applications

2019 ◽  
Vol 22 ◽  
pp. 118-139
Author(s):  
Faisal Aldhabib ◽  
Xiao Dong Sun ◽  
Abdullah Alsumait ◽  
Fahad Alzubi ◽  
Elias Ashe ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
High Performance ◽  
Heat Treatments ◽  
Systematic Evaluation ◽  
Chemical Compositions ◽  
Heating Rates ◽  
Sem Images ◽  
Varied Chemical ◽  
Mechanical And Microstructural Properties

15-5PH stainless steel is widely used in the aerospace industry, from precision fuse pins to forged products, due to its various high-performance properties. However, there is little systematic evaluation of heat treatment responses, especially at ultra-high temperatures above 650°C (1200°F). The objective of this work was to evaluate the mechanical and microstructural properties of 15-5 PH stainless steel at various heat treatments. Multiple heat treatment parameters were tested. The samples tested had varied chemical compositions because they were from different vendors. The experimental work included multiple aging temperatures, time, heating rates, and the effects of multiple aging treatments. A total of 38 different heat treatments were conducted on these specimens. There was a linear correlation between hardness and ultimate and yield strength. Optical microscopy showed martensitic structures with very fine grains in all the tested samples. Scanning Electron Microscope (SEM) images showed ductile fracture in all the samples.

Study on the Effects of Heat Treatments on the Physical and Mechanical Characteristics of 1.4301 Stainless Steel

2021 ◽  
Vol 42 ◽  
pp. 57-62
Author(s):  
Maria Stoicănescu
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Mechanical Characteristics ◽  
Austenitic Stainless Steels ◽  
Heat Treatments ◽  
Hot Plastic Deformation ◽  
Improved Characteristics ◽  
Physical And Mechanical Characteristics

The 1.4301 stainless steel is part of the category of austenitic stainless steels, steels which do no undergo heat treatments in general, as they are intended for hot plastic deformation in particular. The aim of the research presented in this paper was to obtain significantly improved characteristics of the resistance properties in relation to the values obtained under classical conditions, by applying heat treatments. Samples taken from the delivery state material underwent annealing, quenching and ageing heat treatments. Subsequently, the samples thus treated were subjected to tests enabling the determination of the correlations between the heat treatment parameters, the structure and the properties.

Effects of Plastic Deformation, Heat Treatment and Molybdenum and Nickel Concentration on Lath Martensitic Microstructure

2017 ◽  
Vol 885 ◽  
pp. 222-227
Author(s):  
István Atanáz Hangyás ◽  
Enikő Réka Fábián ◽  
Tibor Berecz
Keyword(s):  
Heat Treatment ◽  
Plastic Deformation ◽  
Cold Rolling ◽  
Heat Treatments ◽  
Nickel Concentration ◽  
Chemical Compositions ◽  
Martensitic Microstructure

Lath martensitic microstructures were produced in steels containing 0.15% of carbon and various amounts of molybdenum and nickel. The behavior of the lath martensitic microstructure was studied during cold rolling in steels with six different chemical compositions. All materials have endured 75% deformation without damage. In addition, the effects of heat treatments on microstructures and hardness were investigated as well.

Problems Associated with Heat Treated Parts

2021 ◽  
pp. 307-325
Author(s):  
Jon L. Dossett
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Cold Working ◽  
Heat Treating ◽  
Heat Treatments ◽  
Quenching Media ◽  
Heat Treated ◽  
Nonferrous Alloys

Abstract This article introduces some of the general sources of heat treating problems with particular emphasis on problems caused by the actual heat treating process and the significant thermal and transformation stresses within a heat treated part. It addresses the design and material factors that cause a part to fail during heat treatment. The article discusses the problems associated with heating and furnaces, quenching media, quenching stresses, hardenability, tempering, carburizing, carbonitriding, and nitriding as well as potential stainless steel problems and problems associated with nonferrous heat treatments. The processes involved in cold working of certain ferrous and nonferrous alloys are also covered.

scholarly journals Evaluation of Heat-Treated AISI 316 Stainless Steel in Solar Furnaces to Be Used as Possible Implant Material

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 581
Author(s):  
Ioan Milosan ◽  
Monica Florescu ◽  
Daniel Cristea ◽  
Ionelia Voiculescu ◽  
Mihai Alin Pop ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Solar Energy ◽  
Heat Treatments ◽  
Solar Furnace ◽  
316 Stainless Steel ◽  
Heat Treated ◽  
Aisi 316 Stainless Steel ◽  
Aisi 316

The appropriate selection of implant materials is very important for the long-term success of the implants. A modified composition of AISI 316 stainless steel was treated using solar energy in a vertical axis solar furnace and it was subjected to a hyper-hardening treatment at a 1050 °C austenitizing temperature with a rapid cooling in cold water followed by three variants of tempering (150, 250, and 350 °C). After the heat treatment, the samples were analyzed in terms of hardness, microstructure (performed by scanning electron microscopy), and corrosion resistance. The electrochemical measurements were performed by potentiodynamic and electrochemical impedance spectroscopy in liquids that simulate biological fluids (NaCl 0.9% and Ringer’s solution). Different corrosion behaviors according to the heat treatment type have been observed and a passivation layer has formed on some of the heat-treated samples. The samples, heat-treated by immersion quenching, exhibit a significantly improved pitting corrosion resistance. The subsequent heat treatments, like tempering at 350 °C after quenching, also promote low corrosion rates. The heat treatments performed using solar energy applied on stainless steel can lead to good corrosion behavior and can be recommended as unconventional thermal processing of biocompatible materials.

scholarly journals Towards Identification of Zircon Populations in Permo-Carboniferous Rhyolites of Central Europe: Insight from Automated SEM-Mineral Liberation Analyses

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 308
Author(s):  
Arkadiusz Przybyło ◽  
Anna Pietranik ◽  
Bernhard Schulz ◽  
Christoph Breitkreuz
Keyword(s):  
Central Europe ◽  
Detailed Examination ◽  
Quantitative Information ◽  
Chemical Compositions ◽  
Sem Images ◽  
Thin Sections ◽  
Varied Chemical ◽  
Different Populations ◽  
Automated Scanning ◽  
Sem Analyses

Zircon is a main mineral used for dating rhyolitic magmas as well as reconstructing their differentiation. It is common that different populations of zircon grains occur in a single rhyolitic sample. The presence of both autocrystic and antecrystic zircon grains is reflected in their strongly varied chemical compositions and slight spread of ages. However, postmagmatic processes may induce lead loss, which is also recorded as a spread of zircon ages. Therefore, new approaches to identify different zircon populations in rhyolitic rocks are needed. In this study, we suggest that detailed examination of zircon positions in the thin sections of rhyolitic rocks provides valuable information on zircon sources that can be used to identify autocrystic and antecrystic zircon populations. Automated Scanning Electron Microscope (SEM) analyses are of great applicability in determining this, as they return both qualitative and quantitative information and allow for quick comparisons between different rhyolite localities. Five localities of Permo-Carboniferous rhyolites related to post-Variscan extension in Central Europe (Organy, Bieberstein, Halle, Chemnitz, Krucze) were analyzed by automated SEM (MLA-SEM). The samples covered a range of Zr whole rock contents and displayed both crystalline and glassy groundmass. Surprisingly, each locality seemed to have its own special zircon fingerprint. Based on comparisons of whole rocks, modal composition and SEM images Chemnitz ignimbrite was interpreted as containing mostly (or fully) antecrystic zircon, whereas the Bieberstein dyke was shown to possibly contain both types, with the antecrystic zircon being associated with disturbed cumulates. On the other hand, Organy was probably dominated by autocrystic zircon, and Krucze contained dismembered, subhedral zircon in its matrix, whereas Halle zircon was located partly in late veins, filling cracks in laccolith. Both localities may, therefore, contain zircon populations that represent later stages than the crystallization of the main rhyolitic body.

Preparation and Property of Ceramic Matrix Coating of Anti-Oxidation for Stainless Steel at High Temperature by Slurry Method

2010 ◽  
Vol 105-106 ◽  
pp. 448-450
Author(s):  
Peng Liu ◽  
Lian Qi Wei ◽  
Shu Feng Ye ◽  
Xun Zhou ◽  
Yu Sheng Xie ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Melting Temperature ◽  
Oxidation Resistance ◽  
High Performance ◽  
Ceramic Coating ◽  
Ceramic Matrix ◽  
Sem Images ◽  
Temperature Oxidation ◽  
Slurry Method

In this paper, the new high temperature ceramic matrix coating of anti-oxidation for stainless steel was prepared by slurry method. With the research about oxidation resistance of ceramic matrix coating formed on stainless steel, the effect of initial melting temperature, melting temperature range and thermal expansion coefficients of ceramic sintering change on protective properties of high temperature coating prepared at 1250°C is investigated, and then high temperature sintering ceramic with high-performance is gained through optimization. Through the test of TG-DTA and XRD to the coating, study on high temperature oxidation resistance of ceramic coating and the structure changing of the scale with coating from SEM images and photos, it is shown that the ceramic coating has excellent oxidation resistant properties, the weight loss with coating decrease more than 85%.

Effect of Heat Treatment on the Microstructure of Plasma Spray SUS316L Stainless Steel Coating

2015 ◽  
Vol 1101 ◽  
pp. 419-422
Author(s):  
Jin Wang ◽  
Nobuya Shinozaki ◽  
Zhen Su Zeng ◽  
Nobuaki Sakoda
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Large Scale ◽  
Heat Treatments ◽  
Electron Probe Microanalyzer ◽  
Steel Coating ◽  
Sprayed Coating ◽  
Increasing Temperature ◽  
Plasma Sprayed ◽  
Stainless Steel Coatings

A study of the effects of heat treatments of plasma sprayed SUS316L stainless steel coatings was performed. The stainless steel coatings were treated at the conditions of 1273 K and 1373 K for 45 minutes in flowing argon. The effectiveness of the heat treatment was determined using an electron probe microanalyzer (EPMA). The results indicated that the heat treatments were able to significantly affect the composition and the microstructure. After the heat treatment, the interconnected micro-pores were found to appear in the large-scale rod-like oxide in the coating and the content of chromium and manganese in the oxides became higher than that in the as-sprayed coating. The heat-treatment became more effective with increasing temperature.

scholarly journals Short-Term Heat Treatment of Ti6Al4V ELI as Implant Material

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4948
Author(s):  
Phuong Thao Mai ◽  
Therese Bormann ◽  
Robert Sonntag ◽  
Jan Philippe Kretzer ◽  
Jens Gibmeier
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Medical Technology ◽  
Systematic Evaluation ◽  
Medical Applications ◽  
Heating Rates ◽  
Short Term ◽  
Near Surface ◽  
Parameter Field ◽  
Good Biocompatibility

Due to its mechanical properties and good biocompatibility, Ti6Al4V ELI (extra low interstitials) is widely used in medical technology, especially as material for implants. The specific microstructures that are approved for this purpose are listed in the standard ISO 20160:2006. Inductive short-term heat treatment is suitable for the adjustment of near-surface component properties such as residual stress conditions. A systematic evaluation of the Ti6Al4V microstructures resulting from short-term heat treatment is presently missing. In order to assess the parameter field that leads to suitable microstructures for load-bearing implants, dilatometer experiments have been conducted. For this purpose, dilatometer experiments with heating rates up to 1000 °C/s, holding times between 0.5 and 30 s and cooling rates of 100 and 1000 °C/s were systematically examined in the present study. Temperatures up to 950 °C and a holding time of 0.5 s led to microstructures, which are approved for medical applications according to the standard ISO 20160:2006. Below 950 °C, longer holding times can also be selected.

Effects of Post Weld Ageing Heat Treatments on the Microstructure of 17-4PH GTA Welded Joints

2011 ◽  
Vol 264-265 ◽  
pp. 1300-1305 ◽  
Author(s):  
Seyed Ali Asghar Akbari Mousavi ◽  
S.A. Hoseini Hosein Abad
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Weld Metal ◽  
Mechanical Strength ◽  
Base Metal ◽  
Precipitation Hardening ◽  
Solution Treatment ◽  
Heat Treatments ◽  
Operational Parameters ◽  
Before And After

The mechanical and metallurgical properties of the 630 (17-4PH) precipitation hardening stainless steel is greatly influenced by the type of applied heat treatments cycles. In order to achieve the homogenous microstructure in the weld metal and eliminate the HAZ due to producing the weak mechanical strength, and producing similar microstructures and mechanical strength in both weld and base metal, the study was conducted to find an optimum pre and post heat treatments before and after welding. The 2.2mm thick and 48mm tube diameter made of 630 stainless steel were welded under various operational parameters. The samples were subjected to pre weld solution treatment and post weld aging heat treatment. To reveal the microstructures of the welds, the optical and scanning electron microscopy of the welds carried out. The study shows that the direct ageing treatment at 6200C after welding can give rise to the best heat treatment to produce, the uniformity in the grain size, mechanical strength and hardness, between the base metal and the weld metal.

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