Quantitative Assessment of Stress Relaxation in Tin Films by the Formation of Whiskers, Hillocks, and Other Surface Defects

The influence of sputtering power, N2 flow rate, ion current and substrate temperature on the monolayer TiN films deposited by ion beam assisted magnetron sputtering and the effect of the on-off ratio and deposition period on the multilayered Ti/TiN films was studied. It was found that the key factors affecting surface defects of monolayer TiN films are sputtering power and N2 flow rate while ion current is the most significant factor affecting the hardness of monolayer TiN films. The surface defects can be greatly inhibited by pulsed gas feeding. The adhesion and hardness of the multilayered Ti/TiN films is improved with increasing on-off ratio or decreasing deposition period; the on-off ratio has a negligible effect on the surface defects of the multilayered Ti/TiN films while the surface defects of the multilayered Ti/TiN films become more obvious at a long deposition period.

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Assessment of stress relaxation experiments on diamond coatings analyzed by digital image correlation and micro-Raman spectroscopy

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2013.07.025 ◽

2013 ◽

Vol 237 ◽

pp. 255-260 ◽

Cited By ~ 8

Author(s):

Furqan Ahmed ◽

Markus Krottenthaler ◽

Christoph Schmid ◽

Karsten Durst

Keyword(s):

Raman Spectroscopy ◽

Stress Relaxation ◽

Digital Image Correlation ◽

Digital Image ◽

Image Correlation ◽

Diamond Coatings ◽

Micro Raman Spectroscopy ◽

Relaxation Experiments ◽

Assessment Of Stress

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The quantitative assessment of stress-induced voiding in process qualification

2001 IEEE International Reliability Physics Symposium Proceedings. 39th Annual (Cat. No.00CH37167) ◽

10.1109/relphy.2001.922924 ◽

2002 ◽

Cited By ~ 3

Author(s):

A.H. Fischer ◽

A.E. Zitzelsberger

Keyword(s):

Quantitative Assessment ◽

Process Qualification ◽

Assessment Of Stress

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Quantitative Assessment of Stress Adaptation of Experimental Animals to Field Exposure Based on the Entropy Approach

International Journal of Current Research and Review ◽

10.31782/ijcrr.2020.122214 ◽

2020 ◽

Vol 12 (22) ◽

Author(s):

Khudoikulova Shoira Narzullaevna ◽

Laptev Dmitry Sergeevich ◽

Stepanov Vladimir Alexandrovich ◽

Egorkina Svetlana Borisovna ◽

Belykh Vyacheslav Vyacheslavovich

Keyword(s):

Quantitative Assessment ◽

Stress Adaptation ◽

Field Exposure ◽

Experimental Animals ◽

Assessment Of Stress

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EVALUATION OF THE CONTACT SURFACE PARAMETERS AT KNURLING FINNED HEAT-EXCHANGING SURFACE BY KNURLS AT RING BLANKS

Periódico Tchê Química ◽

10.52571/ptq.v17.n36.2020.387_periodico36_pgs_372_389.pdf ◽

2020 ◽

Vol 17 (36) ◽

pp. 372-389

Author(s):

Aslan Adal bievich TATARKANOV ◽

Islam Alexandrovich ALEXANDROV ◽

Andrej Vladimirovich OLEJNIK

Keyword(s):

Contact Surface ◽

High Performance ◽

Quantitative Assessment ◽

Surface Defects ◽

High Surface ◽

Accurate Calculation ◽

High Surface Quality ◽

Transverse Strains ◽

Ring Blank ◽

Laborious Method

Tubular parts with an external finned heat-exchanging surface are usually produced by the laborious method of cutting on lathes. Besides, there is a method for the high-performance manufacturing of fins by cold knurling with ring-cut knurls, which, compared with cutting, reduces labor intensity by two to six times with a significant increase in the operational properties of the product. The disadvantage of the cold knurling method with ring-cut knurls can be unwanted surface defects and deformations of the entire product. Obtaining finned surfaces on ring blanks with high surface quality during knurling requires accurate calculation of the ratio of longitudinal and transverse strains. The most important factors determining the ratio of longitudinal and transverse strains (rolling-out and rolling-off) are the length and width of the contact surface. The need for a quantitative assessment of the parameters of longitudinal and transverse strains determined the purpose of this manuscript. This study aimed to develop a methodology for calculating the contact surface of a knurl with a ring blank (pipe) when knurling with ring-cut knurls. The proposed method for calculating the knurl's contact surface with a tube when knurling with ring-cut knurls allows for estimating the recommended range of pipe sizes for knurling. Based on the dependencies mentioned in the manuscript, the limiting sizes for blank pipes were calculated to ensure high-quality finning. Experiments on cold rolling of ribbing on pipes with different lengths and diameter ratios were carried out, confirming the possibility of using the proposed methodology for calculating the knurl's contact surface with a pipe when knurling heat-exchanging finning with ring-cut knurls.

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