Ra roughness value

USAGE SUMMARY

The phrase "Ra roughness value" is correct and usable in written English.
It is typically used in technical contexts, particularly in engineering and manufacturing, to refer to a specific measurement of surface roughness. Example: "The Ra roughness value of the machined part must be below 0.8 micrometers to ensure proper functionality."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

For the pristine sapphire surface a rather smooth topography is obtained, characterized by an Ra roughness value of 0.9 nm.

Applied Adhesion Science

Concerning GO/sapphire adsorbates, in Fig. 7a a region with an Ra roughness value of 3.1 ± 0.5 nm is presented which is higher than the value of 1.8 ± 0.7 nm obtained before rinsing.

Applied Adhesion Science

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

The efficiency has shown significant variation with nano-scale roughness of N-TiO2 thin film and the thin film which has minimum Ra (average roughness) value shows the highest efficiency value but other factors such as root mean square (RMS) roughness Rq and Rsk (skewness) have also effected.

International Nano Letters

Ra surface roughness values increased with the increasing tool wear.

Measurement

Accelerated four-ball and five-ball rolling tests were performed on HIPed Si3N4 ball samples (rough lapped with surface roughness value Ra 0.08 μm and Rq 0.118 μm) in fully lubricated condition.

Materials & Design

EN deposits with addition of surfactant SDS and CTAB at a concentration of 0.6 g/l produce a smooth surface and the average roughness value (Ra) is 1.715 µm for SDS and 1.607 µm for CTAB which is less than the Ra value of EN deposit without surfactant addition (1.885 µm).

Surface and Coatings Technology

The mean average roughness value (Ra) with addition of surfactant is 1.796 µm.

Surface and Coatings Technology

Average roughness value (Ra), measured on a surface profilometer: Talysurf PGI-120, indicated the response.

Journal of Manufacturing Processes

However, the surface roughness value, Ra of the internal SLM surface is about 10 μm.

Precision Engineering

Empirical models for roughness value (Ra) and corrosion resistance (Rs) are fitted against these two variables in the CCD study.

Surface and Coatings Technology

Further, analysis has shown that the hybrid adhesive is able to work on surfaces with roughness value Ra within 300 nm.

Mechatronics

Expert writing Tips

Best practice

When reporting surface roughness, always include the units (e.g., micrometers or nanometers) to provide context and clarity.

Common error

Avoid using "Ra" interchangeably with "Rq" (root mean square roughness) or "Rz" (maximum height of the profile). Each parameter provides different information about the surface texture.

Linguistic Context

The phrase "Ra roughness value" functions as a noun phrase that specifies a particular measurement of surface texture. As Ludwig AI confirms, it's grammatically sound. The term "Ra" modifies "roughness value", indicating that the roughness is quantified using the arithmetic average method.

Expression frequency: Rare

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Academia

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Ludwig's WRAP-UP

The phrase "Ra roughness value" is a technical term used to specify surface texture, with "Ra" denoting Arithmetic Average Roughness. Ludwig AI validates its grammatical correctness. Predominantly found in scientific contexts, it serves to provide a standardized metric for surface finish in fields like engineering and manufacturing. While its usage is relatively rare, understanding the phrase is vital in technical domains. Alternative phrases like "average roughness measurement" can be used, but clarity and precision should be prioritized in technical writing. Always remember to include units and avoid confusing "Ra" with other roughness parameters like "Rq" or "Rz".

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

Average roughness measurement

Focuses on the measurement aspect, implying the Ra value.

Arithmetic average roughness

Specifies the calculation method for roughness.

Surface roughness parameter Ra

Reorders the phrase to emphasize 'surface roughness'.

Mean surface roughness

Emphasizes the average nature of the roughness.

Ra surface finish

Uses 'surface finish' as a synonym for 'roughness'.

Roughness average Ra

Inverts the order, emphasizing the 'roughness' aspect.

Surface texture Ra

Uses 'surface texture' as a broader term encompassing roughness.

Ra value for surface roughness

Specifies that Ra is a value used for surface roughness.

Profile average roughness

Highlights that the measurement is based on a surface profile.

Roughness height Ra

Specifies that the Ra value represents a height measurement.

FAQs

What does "Ra" stand for in "Ra roughness value"?

"Ra" stands for Arithmetic Average Roughness, which is a measure of the average roughness of a surface.

How is the "Ra roughness value" measured?

The "Ra roughness value" is typically measured using a profilometer or atomic force microscopy (AFM). The profilometer traces the surface and calculates the average deviation from the mean line. AFM uses a sharp tip to scan the surface and create a topographical map.

What are some alternative ways to describe surface roughness besides using the phrase "Ra roughness value"?

You can use alternatives like "average roughness measurement" or "mean surface roughness" depending on the context.

What is the significance of the "Ra roughness value" in manufacturing?

The "Ra roughness value" is important in manufacturing because it affects the performance and appearance of products. It influences friction, wear, sealing, and adhesion. Controlling surface roughness ensures parts function correctly and meet quality standards.