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fatigue fracture

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Journal Articles
AM&P Technical Articles (2021) 179 (7): 46–49.
Published: 01 October 2021
...Louis G. Malito; Matthew L. Bowers; Paul L. Briant; Gabriel S. Ganot; Brad James Nitinol fatigue fracture surfaces generally exhibit similar features to most engineering alloys, including a flat fracture plane, ratchet marks, radial lines, beachmarks, and striations. Nitinol fatigue fracture...
Journal Articles
AM&P Technical Articles (2020) 178 (7): 35–37.
Published: 01 October 2020
...A.R. Pelton; S.M. Pelton; J. Ulmer; K. Plaskonka; A. Keck; M.R. Mitchell; P. Saffari The effects of Nitinol micropurity on the durability of superficial femoral artery stents offers a potential way to enhance durability and reduce fatigue fractures. This article describes recent work on superior...
Journal Articles
AM&P Technical Articles (2019) 177 (6): 23–24.
Published: 01 September 2019
... SEM analysis of a trailer hitch fatigue failure. Copyright © ASM International® 2019 2019 ASM International failure analysis fatigue fracture fracture surface scanning electron microscopy httpsdoi.org/10.31399/asm.amp.2019-06.p023 23 ADVANCED MATERIALS & PROCESSES | SEPTEMBER 2019...
Journal Articles
AM&P Technical Articles (2023) 181 (7): 40–42.
Published: 01 October 2023
... fatigue and to eventually be able to predict when fracture will occur. This article reports on a multifaceted testing and modeling approach to investigate the fatigue life of medical grade Nitinol to one billion cycles. The goal of a the research is to understand the mechanism of Nitinol ultra-high...
Journal Articles
AM&P Technical Articles (2022) 180 (6): 30–31.
Published: 01 September 2022
... Fatigue fracture features would have guessed how to prevent repeat failures for all three? Remember, if (b) even one guess were made Fig. 1 Failed chain link (a) shows signs of fracture (b) due wrong, people might have to fatigue. gotten hurt. way to cause fatigue failure of a perfect- CASE STUDY 1 ly...
Journal Articles
AM&P Technical Articles (2013) 171 (5): 29–32.
Published: 01 May 2013
... of selected fatigue tested samples and demonstration parts was conducted using scanning electron microscopy (SEM) to identify crack initiation sites and fracture modes. Test results Table 2 and Fig. 3 show quasi-static test results of the LSPR lap joints. Both material combination and the addition of adhesive...
Journal Articles
AM&P Technical Articles (2014) 172 (8): 18–22.
Published: 01 August 2014
... of steel screw failures highlights some of the critical manufacturing and design factors that affect fastener fatigue. Copyright © ASM International® 2014 2014 ASM International fastener fatigue fracture fracture surfaces threaded fasteners httpsdoi.org/10.31399/asm.amp.2014-08.p018...
Journal Articles
AM&P Technical Articles (2021) 179 (6): 13–18.
Published: 01 September 2021
... processes that result in microtexture formation. Copyright © ASM International® 2021 2021 ASM International deformation behavior fatigue properties fracture surfaces microstructural analysis microtexture titanium alloys AT IDTVAANNI UC EMD FMA TAITGEUR EI AALNSA&L YPSRI SO C E S S E S...
Journal Articles
AM&P Technical Articles (2014) 172 (6): 26–27.
Published: 01 June 2014
... undergraduate engineering program with many research opportunities. Recent corrosion research Corrosion, corrosion fatigue, fracture and fatigue, surface treatments, hybrid materials, and composites are central subjects of the mechanical engineering faculty for materials and mechanics, and have inspired many...
Journal Articles
AM&P Technical Articles (2015) 173 (9): 48.
Published: 01 October 2015
...-process them to remove defects that can initiate fatigue fractures, resulting in director of WPI s Metal Processing Institute, holds an intricate metal object fabricated layer by layer using additive manufacturing. a deterioration in the mechanical properties of the material, says Richard Sisson, WPI...
Journal Articles
AM&P Technical Articles (2021) 179 (3): 14–18.
Published: 01 April 2021
...Michelle Harr; Adam Pilchak; Lee Semiatin Despite decades of research, fundamental questions still exist regarding the role of microtexture on the deformation, fatigue, and fracture behavior of titanium alloys. This article describes the microstructural evolution processes that result...
Journal Articles
AM&P Technical Articles (2022) 180 (6): 22–26.
Published: 01 September 2022
...John Campbell A look at how bifilms are created during casting may offer clues to eliminating cracks, tensile fracture, fatigue failure, pitting, and stress corrosion cracking failures. A look at how bifilms are created during casting may offer clues to eliminating cracks, tensile fracture...
Journal Articles
AM&P Technical Articles (2021) 179 (3): 52–55.
Published: 01 April 2021
..., especially with regards to durability and corrosion Fig. 3 Nitinol fatigue fracture surface after 29 million loading cycles. Fatigue striations from crack growth can be seen on the left while the dimpled region on the right is indicative of the final tensile (Fig. 3). One of the key unknowns was whether...
Journal Articles
AM&P Technical Articles (2013) 171 (8): 24–25.
Published: 01 August 2013
... compares structural stress at the hot spot with the FAT (fatigue) class of different weld details. Effective notch stress analysis can assess both toe and root stress level, again comparing each to a special FAT class. Fracture mechanics can simulate typical weld defects on any part of the weld, using...
Journal Articles
AM&P Technical Articles (2018) 176 (7): 30–33.
Published: 01 October 2018
... longer lives are possible. Complications cause implants to fail more rapidly. Primary failure modes for polymeric bearing materials include wear, yielding, creep, fatigue, fracture, delamination, and chemical damage. Wear becomes an increasingly critical concern over the implant lifetime because...
Journal Articles
AM&P Technical Articles (2013) 171 (11): 13–18.
Published: 01 November 2013
.... Fatigue crack provides a sharp discontinuity from which either unstable fracture or stable tearing will initiate during the fracture toughness test. Correct placement of the fatigue crack is of great importance in order to sample the material or microstructure of interest, particularly when characterizing...
Journal Articles
AM&P Technical Articles (2016) 174 (3): 16–20.
Published: 01 March 2016
..., 2014. Fig. 5 E ect of alloying on fracture mechanism during cyclic loading: (a) Brittle fracture of particles in alloy without Zr, V, and Ti additions; (b) fracture propagation path shows ductile nature of particles in alloy modified with additions of Ti-V and Zr, which lead to improved fatigue life...
Journal Articles
AM&P Technical Articles (2019) 177 (8): 63–67.
Published: 01 November 2019
... in fatigue strength[2]. The change in fracture mode to brittle failure limits the load carrying capability of quenched and tempered components, leading ASPPRC to identify microstructural improvements that could overcome this limitation. The initial investigation looked for ways to reduce austenite grain size...
Journal Articles
AM&P Technical Articles (2022) 180 (3): 25–28.
Published: 01 April 2022
... for ultrasonic fatigue testing of metals (WES 1112:2017), which describes the theory and testing procedures in detail[3]. EXAMPLES Fig. 7 Fracture surface of SNCM439 sample. To demonstrate the technique, the staff of the Global Applications Develop- ment Laboratory of Shimadzu Corporation in Kyoto, Japan...
Journal Articles
AM&P Technical Articles (2016) 174 (7): 16–18.
Published: 01 July 2016
... medicine clinicians, mechanical testing is essential to optimize material performance, minimize injury, and improve recovery outcomes. Fatigue testing of athletic footwear determines energy absorption. Impact testing of a ski boot determines fracture properties. Biomechanics applies established mechanical...