An ultra-fine-grained AISI 301LN austenitic stainless steel has been achieved by heavy cold rolling, to induce the formation of martensite, and subsequent annealing at 800 C, 900 C, and 1000 C, from 1 to 100 seconds. The microstructural evolution was analyzed using transmission electron microscopy and the yield strength determined by tension testing. Ultra-fine austenite grains, as small as ~0....

in the present study, an ultrafine grained (ufg) 304l stainless steel with the average grain size of 300 nm was produced by a combination of cold rolling and annealing. weldability of the ufg sample was studied by nd: yag laser welding under different welding conditions. taguchi experimental design was used to optimize the effect of frequency, welding time, laser current and laser pulse duratio...

Single droplet impingement onto inclined heated surface is studied experimentally. Droplet in the form of aquades dropped from a fixed height 70 mm to metal with 45º impact angle. This experiment uses 3 types metals; Stainless Steel AISI 304, Aluminum Alloy 2024, and Copper. All material surfaces are mirror polished assumed have same treatment condition. Surface temperatures 110 ºC, 150 ºC 210 ...

We have taken advantage of the native surface roughness and the iron content of AISI 316 stainless steel to directly grow multi-walled carbon nanotube (MWCNT) random networks by chemical vapor deposition (CVD) at low-temperature (1000°C) without the addition of any external catalysts or time-consuming pre-treatments. In this way, super-hydrophobic MWCNT films on stainless steel sheets were obta...

AE monitoring from various types of stress corrosion cracking (SCC) has been conducted for the past 15 years in our laboratory. This paper discusses AE results of active-path dissolution-type SCC of austenitic stainless steel in chloride solution and fused salt, fluoride and polythionic acid solutions, brass in ammonia (Mattosson's solution), and carbon steels in nitrite solution. Transgranular...

The purpose of the tests was to determine whether and how sterilisation process of samples made of AISI 316L stainless steel with diff erent strain impacts their corrosion resistance. Tests were made on steel samples that had been electrochemically polished in order to assure proper surface roughness. In order to evaluate the infl uence of sterilisation on physical and chemical properties of st...

In additive manufacturing, powder characteristics play an important role in terms of flowability and densification, which can be improved by the use spherical powders. this study, irregular was spheroidised plasma treatment, properties were measured. Powder characterisation conducted to determine morphology, particle size distribution as well flowability. Spherical AISI 304 stainless steel powd...

In this study, the effects of punch edge radius and blanking clearance on product quality process in AISI 304 stainless steel sheet were investigated by using fi-nite element analysis method. The analyzes performed at four different tip radii (0.01, 0.25, 0.5, 1 mm) three (1 %, 5%, 10%). As a result analysis, rollover, burr length increased, smooth sheared / fractured surface ratio force decrea...

in this paper, dissimilar resistance spot welding of aisi 1075 eutectoid steel to aisi 201 stainless steel is investigated experimentally. for this purpose, the experiments are designed using response surface methodology and based on four-factor, five-level central composite design. the effects of process parameters such as welding current, welding time, cooling time and electrode force are inv...