Relationship Between Ultrasonic Characteristics and Mechanical Properties of Tempered Martensitic Stainless Steel

Hsu, Cheng-Hsun; Teng, Hwei-Yuan; Chen, Yeong-Jern

doi:10.1361/15477020420828

Cited by 14 publications

(5 citation statements)

References 5 publications

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“…This is due to the high interfacial energy found at the martensite boundaries which causes the coarsening of ferrite grains that emanates from the as-quenched martensite. This result was also reported in previous work [8][9][10][11]. Fig.…”

Section: Resultssupporting

confidence: 92%

Microstructural and Mechanical Characterization of Artificially-Aged Power Plant Steel

Rayes

El‐Danaf

Almajid

2016

MSF

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Degradation of properties due to ageing at high temperature service is a common problem which normally occurs in electricity generation power plants, refineries, petrochemical industries. This work investigates the influence of accelerated artificial ageing on the microstructural and mechanical properties of 9-12%Cr steel usually used in power plants. This steel was tested in the as-produced and aged for 2, 5 and 8 weeks at 700°C. Results showed that the microstructural features such as phases, carbides, i.e. morphology and type, sub-grains and their boundaries and misorientation angles are the dominant factors influencing the mechanical properties. Ageing led carbides to go into solution in the martensite-ferrite structure and also led to the increase of average misorientation angle as well as to the reduction of low angle grain boundaries. In addition, ageing led to the reduction in the mechanical properties and hardness when compared to the as-produced condition.

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Section: Resultssupporting

confidence: 92%

Microstructural and Mechanical Characterization of Artificially-Aged Power Plant Steel

Rayes

El‐Danaf

Almajid

2016

MSF

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“…The attenuation coefficient of the ultrasonic wave is affected by absorption and scattering. Absorption can be due to dislocation damping, magnetic resistance, or thermal elasticity, and scattering can be due to grain boundaries, voids, inclusions, secondphase particles, and cracks [Hsu et al 2004]. The ultrasonic attenuation coefficient (α) is calculated from the equation…”

Section: Methodsmentioning

confidence: 99%

“…The relationship between ultrasonic and mechanical properties has been studied for various materials, including tempered CA-15 martensitic stainless steel [Hsu et al 2004], SiC ceramics [ASTM E664-93 2000], and Nimonic alloys [Murthy et al 2008;. A few studies have also been conducted on the dependency of ultrasonic wave velocity and microstructure of materials.…”

Section: Introductionmentioning

confidence: 99%

Measurement of elastic properties of AISI 52100 alloy steel by ultrasonic nondestructive methods

Hamidnia

Honarvar

2012

J. Mech. Mater. Struct.

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In certain applications, it is important to measure the mechanical properties of steel with high accuracy. These measurements are usually performed by destructive processes, in which the test sample is destroyed. Destructive techniques cannot detect the minuscule changes made in the mechanical properties of steel during heat treatment processes. Ultrasonic nondestructive testing is an alternative method that can be used for measuring the mechanical properties of steel more precisely. In this paper, the ultrasonic method is used for measuring the elastic properties of AISI 52100 steel samples which are heat treated at different levels. Each sample has its specific microstructure and hardness due to the heat treatment process it has gone through. The elastic properties of each sample are obtained by measuring the velocities of longitudinal and shear waves in each sample. Comparison of the results obtained from ultrasonic measurements with those available in reference tables shows that the ultrasonic technique can measure the elastic properties of AISI 52100 samples with high accuracy. The ultrasonic technique also shows that it can identify the tempered martensite embrittlement zone in AISI 52100 samples.

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“…A set of test pieces can be taken straight from a production line to find the aggregate trend and the boundaries for production variations statistically [17][18][19]. Finally, several test pieces can be prepared in order to vary a particular property only whilst keeping the other properties the same (e.g., varying test piece structure [14,20] or carbon content [21] or process parameters [14,22]).…”

Section: Relating Ultrasonic Velocity To Surface Hardness: Some Previously Developed Techniques and Resultsmentioning

confidence: 99%

Experimental Ultrasonic Assessment of Steel Induction Hardening by Measuring Two Distinct Times-of-Flight

Chen¹,

Kalashnikov

Challis³

et al. 2013

ujms

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Ultrasonic NDE of case hardening of steel parts presents an attractive alternative to destructive assessment still used in industry. This experimental study showed that the ultrasonic assessment could be conducted by measuring two average times of flight across different dimensions of a hardened test sample. The consistently observed difference in the corresponding average ultrasound velocities was above the estimated accuracy of the measurements, and the scattered individual calculated values formed distinct clusters. The results were obtained by using a high resolution data acquisition instrument with the equivalent sampling frequency of 1.5 GHz and 512 averages, and differential measurements of the time of flight by determining zero crossings of the echo waveforms.

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Relationship Between Ultrasonic Characteristics and Mechanical Properties of Tempered Martensitic Stainless Steel

Cited by 14 publications

References 5 publications

Microstructural and Mechanical Characterization of Artificially-Aged Power Plant Steel

Microstructural and Mechanical Characterization of Artificially-Aged Power Plant Steel

Measurement of elastic properties of AISI 52100 alloy steel by ultrasonic nondestructive methods

Experimental Ultrasonic Assessment of Steel Induction Hardening by Measuring Two Distinct Times-of-Flight

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