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

Diffusion Foundations Pub Date : 2019-05-01 DOI:10.4028/www.scientific.net/DF.22.118

F. Aldhabib, Xiao Dong Sun, A. Alsumait, F. Alzubi, E. Ashe, Keren Shen, D. Lu, A. Cheng, K. Tovalin, Martin Del Campo, A. Taormina, Yong Jun Li, B. Ramsey, L. Zeng, O. Es-Said

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引用次数: 2

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.

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热处理对紧固件用15-5 pH不锈钢组织和力学性能的影响

15-5PH不锈钢由于其各种高性能性能，广泛应用于航空航天工业，从精密保险丝销到锻造产品。然而，对热处理反应的系统评价很少，特别是在650°C(1200°F)以上的超高温下。本研究的目的是评价15-5 PH不锈钢在不同热处理条件下的力学和显微组织性能。测试了多种热处理参数。由于来自不同的供应商，测试样品的化学成分各不相同。实验工作包括多种时效温度、时效时间、加热速率以及多种时效处理的效果。对这些试样进行了38种不同的热处理。硬度与极限强度和屈服强度呈线性相关。光学显微镜显示，所有测试样品的马氏体结构具有非常细的颗粒。扫描电镜(SEM)图像显示所有样品均有韧性断裂。

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Diffusion Foundations

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