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Full-Text Articles in Metallurgy
Effect Of Distal Core Flattening On 304 Stainless Steel Guide Wires, Khanh Phan
Effect Of Distal Core Flattening On 304 Stainless Steel Guide Wires, Khanh Phan
Materials Engineering
Abbott Vascular produces a variety of medical guide wires to accommodate a wide array of minimally invasive medical procedures. Certain types of these wires have the distal core flattened to improve specific properties such as flexibility and steerability. However, it is unknown how this affects the other mechanical properties of the wire. Abbott Vascular provided two types of wire to test the effects of distal core flattening on the mechanical performance of the wires. One group of wires was made from 304 single spring stainless steel with no flattening performed. The other group of wires was made from 304 triple …
Effects Of Head Formation And Heat Treatment On The Mechanical Properties Of Connecting Rod Bolts, Caleb A. Leavitt, Matthew R. Lauretta
Effects Of Head Formation And Heat Treatment On The Mechanical Properties Of Connecting Rod Bolts, Caleb A. Leavitt, Matthew R. Lauretta
Materials Engineering
Oliver Racing Parts (ORP; Charlevoix, Michigan) is looking to optimize their manufacturing process for high-strength connecting rod bolts. A high yield strength is desired for the bolts because deformation would result in catastrophic engine failure. The bolts were made of H11, a chromium hot-work tool steel; and MLX17, a precipitation hardenable stainless steel. Tensile testing was performed to determine the tensile and yield strengths of the bolts. Fracture surfaces were imaged via scanning electron microscopy to characterize the failure modes. To observe the effects of bolt heading on microstructure and bolt strength, two batches of MLX17 were prepared; one batch …
Tensile Properties Of High-Strength Connecting Rod Bolts, Leland K. Lam
Tensile Properties Of High-Strength Connecting Rod Bolts, Leland K. Lam
Materials Engineering
Oliver Racing Parts (ORP) is looking to optimize the manufacturing process for high-strength connecting rod bolts. A high yield strength is desired for the bolts because deformation would result in a loss of engine performance. A high tensile strength is also necessary to prevent catastrophic failure if deformation occurs. A high ductility as a proxy for toughness is attractive for resisting crack nucleation and growth during cyclic loading. Bolts were made of MP35N, a nickel-cobalt multiphase alloy; MLX-17, a precipitation hardenable stainless steel; 8740, a low alloy steel; and H11, a chromium hot-work tool steel. The temperature of the most …
Kinked Tensile Behavior Of Cold Worked Nitinol, Grant R. Caraway, Samuel J. Canovas
Kinked Tensile Behavior Of Cold Worked Nitinol, Grant R. Caraway, Samuel J. Canovas
Materials Engineering
To characterize the decrease in ductility caused by an induced stress concentration as a function of various levels of cold work and heat treatment, Nitinol medical guide wires with a .004″ diameter were tested using both a standard, straight tensile test and a modified, bent tensile test. The ratio of the two break loads (bent:straight) for identically processed samples was used as a proxy for measuring the ductility of the guide wires: the higher the ratio, the more ductile the sample. The average break load ratio as a function of increased cold work, decreased from 1.27 to 0.91 for the …