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Keywords: microstructure
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2024
ISBN: 978-0-8031-7745-1
... on the core and surface properties of components. In particular, grain size, residual stress profiles, microstructure, and precipitation were investigated due to their impact on the life duration of aerospace bearings. We first conducted a preliminary review of the existing literature containing published...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7737-6
... The microstructural development of Zircaloy-4 during recrystallization annealing has been studied in specimens that have undergone relatively small strains (approximately less than 0.15). Although important work has been completed to understand the formation of coarse grains in Zircaloy...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7737-6
... and for the as-produced materials of commercial heat treatment. zirconium alloys Zircaloy-2 nuclear fuel cladding microstructure heat treatment solubility matrix composition irradiation radiation damage atom probe tomography ZIRCONIUM IN THE NUCLEAR INDUSTRY: 20TH INTERNATIONAL SYMPOSIUM 149 STP 1645...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7737-6
... Since 2014, the irradiation of material samples manufactured from advanced Russian zirconium alloys has been performed in the VVER-1000 reactor core of Temelin NPP Unit 1, focused on the study of irradiation-induced growth (IIG) and related microstructural changes. The material samples differ...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7733-8
... Understanding the creep failure mechanism depends on identifying the effects of applied load on the evolution of long-term microstructures. Creep tests at elevated temperatures are time consuming and expensive. Thus, it is important to optimize the number of tests needed to reduce the time from...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7733-8
... Researchers have examined a variety of methods for merging various production processes. When coupled with wrought alloys, selective laser melting (SLM) creates a hybrid, more capable production method. This study investigated the tensile characteristics, microstructure, and internal flaws...
eBook Chapter
... based on their oxidation resistance in air and rate sensitivity to temperature variations. However, data measured according to the recommended procedure are useful beyond making comparisons. Quantification of the rate of oxidation and its effects on microstructure and properties is important for nuclear...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7735-2
... Specially processed type 316L stainless steel fabricated via laser powder bed fusion (L-PBF) exhibits a substantial reduction in anisotropy characterized by directionally dependent properties and microstructural features. To promote isotropy, standard electro optical systems (EOS) deposition...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7150-3
... The microstructure of steels for rolling bearings is the single most important parameter in the metallurgy of steels for rolling bearings. The required spheroidize annealing operation for high carbon through hardening steels is reviewed. The microstructure produced in martensitic and bainitic...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7721-5
... manufacturing routes, such as laser powder bed fusion (L-PBF), are discussed. In E-PBF, a very ductile material behavior results from the prevailing process conditions. Furthermore, an as-built condition almost free of residual stresses is established by E-PBF. Microstructural as well as fracture surface...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7708-6
.... Microstructural investigation, densification behavior, and hardness values were studied along with an examination of uniaxial tensile properties at room temperature and 649°C. Microstructural investigations showed that grain orientations strictly depended on heat flow direction where the columnar grains were...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7692-8
... In this study, steels that had undergone different heat treatments resulting in different microstructures were tested under rolling contact fatigue (RCF) and under specific test conditions known to cause white etching cracks (WECs). The test conditions included high slide-to-roll ratios...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7692-8
... and cleanliness assessment results. The interest in using new techniques such as microwave microscopy to reveal subsurface defects is highlighted, underlining how promising these techniques are. bearing steel ASP 2055 powder metallurgy rolling contact fatigue cleanliness microstructure scanning...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7686-7
... the statistical behavior of fatigue and fracture of AM materials by addressing the critical variations of novel microstructure, defects, surface roughness, and residual stress. The software accepts data from multiple sources, including data from the open literature and prior material certification programs. Thus...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7677-5
... Hot isostatic pressing (HIP) is known to improve the fatigue properties of Ti-6Al-4V castings and can result in a significant reduction in porosity. It is often used as a postprocessing step in additively manufactured Ti-6Al-4V-ELI. Microstructure, relative levels of porosity, and particle...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7659-1
... to addressing the need to improve both reliability and reproducibility of results. The objective of this paper is to separate and examine individual sources of error in a number of typical measurements. We will focus on measurements of real microstructural features using optical microscopy and digital imaging...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7671-3
... RAP (RAP-PCC) have been extensively studied, detailed microstructural characterization and understanding crack propagation in RAP-PCC is yet to be established. Although thin-section-based petrographic study (ASTM C856, Standard Practice for Petrographic Examination of Hardened Concrete ) combined...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7641-6
.... irradiation growth Zircaloy-2 Zr0.1 %Sn Zr1.5 %Sn polycrystalline zirconium single-crystal zirconium breakaway growth microstructure texture grain size ZIRCONIUM IN THE NUCLEAR INDUSTRY: 18TH INTERNATIONAL SYMPOSIUM 1 STP 1597, 2018 / available online at www.astm.org / doi: 10.1520/STP159720160034...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7641-6
.... We also present results from detailed microstructural examinations of thick (more than 25 µm) oxide films formed on α-processed Zircaloy-4 grown in a 360°C autoclave and in the reactor. The examinations consisted of optical microscopy, field emission gun scanning electron microscopy, focused ion beam...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7641-6
... the microstructure, phase, and elements composition of oxide films formed on fuel element cladding samples made of alloys E110 (Zr-1 %Nb) and E635 (Zr-1 %Nb-0.35 %Fe-1.2 %Sn) after the autoclave tests in distilled water, and also after four-year operation (for E110 alloys) and six-year operation (for E635 alloys...