The small blind internal thread (SBIT) plays a very important role to firmly fastening some functional components on the cover of 3C electronic products. was made in hole using fluteless forming tap (FFT) without producing chips. However, four geometric parameters FFT (tool width (W), tooth root diameter (D2), front-end (Df), and angle (?)) will affect filling rate (f) minimum torque (T) tappin...

0261-3069/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.matdes.2010.08.008 ⇑ Corresponding author. Address: School of Mechan ing, Nanyang Technological University, 50 Nanyang Republic of Singapore. Tel.: +65 6790 5588; fax: +65 E-mail address: [email protected] (Z.W. Zhon In this study, a rapidly solidified aluminum alloy was compared with beryllium copper and 6061 aluminum alloys in ...

This study investigated the effect of copper addition on AA-7075 aluminum alloy's microstructure and mechanical behavior. Aluminum alloy with reinforcement varying between 0.3 0.7 wt.% was produced using stir casting technique. The cast pre-heated at a temperature 300 °C held for 1 h before charging into bale-out furnace. Two + Cu samples were different weight percent copper. Both as-received s...

in this paper, welding feasibility between aa1100, aa5050 and aa6082 aluminum alloys and a441 aisi steel by friction stir welding has been studied. mathematical analysis of the heat generation during process showed that the maximum temperature produced in aa6082 aluminum alloy and a441 aisi joint but heat distribution in aa1100 aluminum alloy was higher than the other alloys. the investigation ...

TIG arc additive manufacturing experiments were performed utilizing TiB2 nanoparticle-reinforced toward to 7075 aluminum alloy welding wire, and the microstructure mechanical properties corresponding different locations of plate investigated. At top location deposited layer, was characterized by fine dendrite induced solidification, equiaxed grain predominant at middle location. The size bottom...

In this study, different coatings (gray epoxy primer, white varnish and red alkyd paint) of 7075 aluminum alloy are cleaned with a 500 W continuous-wave (CW) fiber laser. We analyzed the influence laser power density on temperature evolution target surface morphology. Under condition continuous irradiation for 1 s, experimental results indicated that suitable cleaning thresholds primer varnish,...

Abstract To enhance the resist corrosion and service safety of 7075 aluminum alloy FSWed joints, an ultrasonic impact treatment was applied, its effects on surface morphology, microhardness, residual stress, performance welded joint were investigated. The experimental results showed that after impact, exhibited larger undulations. distribution trend micro-hardness changed from a “W” to uniform ...