Friction stir processing (FSP) is a surface treatment technology that can eliminate casting defects locally by refining microstructures, thereby improving the mechanical properties of material. The present work investigates the effect of FSP process parameters, typically, the tool rotational and transverse speeds on the microstructure, hardness and tribological behavior of A356 cast aluminum alloy. Three different transverse speeds, typically, 37.5, 60 and 75 mm/min and three different tool rotational speeds, typically, 750, 950 and 1180 rpm were used for FSP. The results revealed that FSP improved significantly the wear resistance of the surfaces of A356 alloy. It has been found that friction stir (FS) processed regions showed finer grain size, better hardness and wear resistance than the as-cast A356 alloy. Increasing the tool rotational and/or the transverse speeds reduces the size α-Al primary grains and increases the hardness and wear resistance of the A356 alloy surfaces.

Please login / register to post comments

news in steel

Higher-quality plate surfaces and enhanced production

Danieli has been awarded a contract by PAO Severstal for the upgrade of plate mill 2800 at Cherepovets (Russia), in order to improve plate surface quality and increase production volume.

Total Strengthens Its Presence in the Industrial Lubricants Market

Total Lubrifiants, a leading player in the global lubricants market, announces the acquisition from Houghton International of its aluminum hot rolling oil (AHRO), steel cold rolling oil (SCRO) and tinplate rolling oil (TPRO) activities in the North American and European Economic Area markets.

Steel Dynamics, Inc. has awarded SMS group an order covering the supply of a complete steel production line for its Sinton location in the state of Texas.

Steel Dynamics Inc. (SDI) has awarded SMS group an order for the supply of a complete steel production line, from the steelworks to the CSP® plant and from the cold rolling mill to the galvanizing line for its Sinton location in the state of Texas.

Wirerod Mill modernization at Baotou Steel, China

Baotou Steel Group Co. Ltd. in China selected Danieli to modernize its 600,000-tpy wirerod mill. The key equipment to be supplied will be a new, four-pass TMB high-speed finishing block to produce smooth-wire from 4.5 to 26 mm diameter, and rebar-wire from 6 to 16 mm diameter at a maximum speed of 110 mps.