Effect of Hardness on the Surface Integrity of AISI 4340 Steel-Reference-Cited by-同舟云学术

Effect of Hardness on the Surface Integrity of AISI 4340 Steel

Published:1986-08-01 Issue:3 Volume:108 Page:169-175
ISSN:0022-0817
Container-title:Journal of Engineering for Industry
language:en
Short-container-title:

Author:

Matsumoto Y.¹,Barash M. M.²,Liu C. R.²

Affiliation:

1. Department of Mechanical and Industrial Engineering, University of Utah, Salt Lake City, Utah

2. School of Industrial Engineering, Purdue University, West Lafayette, IN

Abstract

The effect of hardness on the residual stress in the machined surface of AISI 4340 steel was studied. Chips produced during the machining also were examined and the surface structure was investigated using optical microscope and scanning transmission microscope. Reflection electron diffraction study revealed the existence of austenite in the white layer of the machined surface together with untempered martensite. The residual stress near the machined surface or hardened steel is a compressive stress, and it changes to tensile stress as the hardness decreases. Chip segmentation was observed when steel with hardness of over Rc 50 was machined.

Publisher

ASME International

Subject

General Medicine

Link

http://asmedigitalcollection.asme.org/manufacturingscience/article-pdf/108/3/169/6505886/169_1.pdf

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