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Full-Text Articles in Engineering
Pickling Behavior Of Aisi 304 Stainless Steel In Sulfuric And Hydrochloric Acid Solutions, W Homjabok, S Permpoon, G Lothongkum
Pickling Behavior Of Aisi 304 Stainless Steel In Sulfuric And Hydrochloric Acid Solutions, W Homjabok, S Permpoon, G Lothongkum
Journal of Metals, Materials and Minerals
Oxide scales as well as a Cr-depleted layer, which grows between the oxide scale and base metal, are formed on AISI 304 stainless steel surface during high temperature processing. Pickling is an important process which includes mechanical and chemical operations to remove oxide scales, Cr-depleted layers, and to recover the surface passivity. The multi-step pickling is commonly used because of its higher efficiency than a single step pickling. In this study, the multi-step pickling of AISI 304 stainless steel in HCl solution was investigated instead of H2SO4 solution for the first step of pickling. HF+HNO3 mixed acid is traditionally used …
Adhesion Behavior In Sliding Test Of Austenitic Stainless Steel On Vc Coated By Trd Process, R Piewnim, P Sricharoenchai
Adhesion Behavior In Sliding Test Of Austenitic Stainless Steel On Vc Coated By Trd Process, R Piewnim, P Sricharoenchai
Journal of Metals, Materials and Minerals
Austenitic stainless steel is prone to adhere to tool steels which are used as forming tools. This causes difficulties in the formation of stainless steels.(1) Hard coating on forming tools is a method to diminish adhesion problems. In this work, adhesive behavior of stainless steel was tested against VC coated by thermo-reactive deposition and diffusion (TRD) process. Sliding wear test was conducted under unlubricated condition at room temperature by a ring-on-disc tester. AISI 304 was used as a ring for sliding couple with VC coating layer. DC 53 steel was used as a disc on which VC with a thickness …
Sintered Properties Of 409l Powder Compacts Influenced By Metal Powder Additives, O Coovattanachai, T Yodkaew, M Morakotjinda, N Tosangthum, R Krataitong, A Daraphan, B Vetayanugul, R Tongsri
Sintered Properties Of 409l Powder Compacts Influenced By Metal Powder Additives, O Coovattanachai, T Yodkaew, M Morakotjinda, N Tosangthum, R Krataitong, A Daraphan, B Vetayanugul, R Tongsri
Journal of Metals, Materials and Minerals
Sintering of powder compacts, prepared by admixing of 409L powder with 2-6 wt.% of copper and nickel powders was investigated. It was observed that the strength of the 409L-Cu specimens increased with increasing Cu content. In contrast, sintered density and elongation decreased with increasing Cu content due to swelling effect. When 2 wt.% of Ni powders were added, sintered density and strengths were maximized. When Ni contents higher than 2 wt.% , the decrease of sintered density and strengths were attributed to the number of pores left by the original sites of Ni powder particles.
Fatigue Performance Of High-Temperature Deep-Rolled Metallic Materials, P Juijerm, I Altenberger
Fatigue Performance Of High-Temperature Deep-Rolled Metallic Materials, P Juijerm, I Altenberger
Journal of Metals, Materials and Minerals
High-temperature deep rolling was developed from conventional deep rolling (deep rolling at room temperature) and performed on various metallic materials, such as austenitic stainless steel AISI 304, normalized plain carbon steel SAE 1045, aluminium alloys (non-precipitation-hardenable AA5083 and precipitation-hardenable AA6110). The fatigue performance of high-temperature deep-rolled specimens was investigated using stress-controlled fatigue tests and compared with the conventionally deep-rolled condition. It was found that high-temperature deep rolling effectively enhances the fatigue performance of steels. However, for aluminium alloys, the beneficial effects of high-temperature deep rolling are not pronounced due to the different strengthening mechanisms in aluminium alloys.