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

Author:

Aldhabib Faisal1,Sun Xiao Dong1,Alsumait Abdullah1,Alzubi Fahad1,Ashe Elias1,Shen Ke Ren1,Lu De Yi1,Cheng Adrian1,Tovalin Kelly1,Del Campo Martin1,Taormina Alina Garcia1,Li Yong Jun1,Ramsey Brentt2,Zeng Liang2,Es-Said Omar S.1

Affiliation:

1. Loyola Marymount University

2. Sargent Aerospace and Defense

Abstract

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.

Publisher

Trans Tech Publications, Ltd.

Subject

General Chemical Engineering

Reference21 articles.

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2. Aeon Materials Corp., (2009), 15-5 PH Stainless Steel,, Retrieved from: http://www.aeonmaterials.com/Pages/PHGrades.aspx.

3. H. R. Habibi Bajguirani, (2002), The effect of ageing upon the microstructure and mechanical properties of type 15-5 PH stainless steel,, Materials Science and Engineering, A338, pp.142-159, Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Canada.

4. AK Steel Corporation, (2014), 15-5 PH Stainless Steel,, West Chester, OH. Retrieved from: http://www.aksteel.com/pdf/markets_products/stainless/precipitation/15-5_PH_Stainless_Steel.pdf.

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