Page 7 - Shimadzu DUH-211/

Features Functions

1. Evaluation of Hardness and Material Parameters 5. High-Precision Measurement of Indentation Depth Combines Easy Operability and High-Level Data Processing Functions
in Accordance with Standards (ISO 14577-1 Annex A) No need to measure the actual indentation.
Measure the behavior of a specimen as an indenter is pressed into it and evaluate the Specimen indentation depth can be measured in units of 0.0001 µm for depths up Model used to perform three basic tests: DUH-211
hardness, elastic modulus, and amount of work done during indentation, in compliance to 10 µm. Advanced model provides seven test modes: DUH-211S
with and ISO 14577-1 (instrumented indentation test for hardness) Annex A.
6. Supports a Wide Range of Testing Methods
2. Highly Precise Evaluation of Elastic Modulus
Record the relationship between the test force and the indentation depth. Test both Parameters required for each type of test can be viewed at a glance.
Perform highly precise evaluation of the elastic modulus, using correction based on the unload and load processes. Use the DUH-211S to perform cyclic load-unload
*1
instrument rigidity and the shape of the intender tip . tests and step load-unload tests.
3. Low Test Force with Measurement Resolution 7. Supports Vickers Hardness Test
of 0.196 µN
A function to measure the length of diagonals is provided as a standard feature. This
Control the test force using a high resolution of 0.196 µN. This allows measurement
function allows you to measure the hardness that corresponds only to plastic
of material strength properties in micro regions and in the outermost surfaces of
deformation, Vickers hardness, and Knoop hardness. (A Vickers indenter and Knoop
specimens.
indenter are available as options.) Maximum microscope magnification is 500×
4. Ultra-Wide Test Force Range of 0.1 to 1,961 mN (1000× is available as an option).
Use a wide test range of 0.1 to 1,961 mN for measurement, and test a variety of *1 Indenter tip shape correction is only available for the 115-degree triangular pyramid indenter.
industrial materials, including rubber, plastics, and ceramics. Shape correction is not available for other indenters.

Test Types
Measurement Principle Item DUH-211 DUH-211S
○
1. Load–Hold Test
○
2. Load–Unload Test ○ ○
3. Cyclic Test ○ ○
4. Depth Setting Test — ○
Electromagnetic force is used to press an indenter (standard type: 115° triangular pyramid) against a specimen. Pressing force is increased at a constant
5. Depth Setting Load–Unload Test — ○
rate, from 0 to the preset test force. Indentation depth is automatically measured as the indenter is pressed against the specimen. This allows dynamic
6. Step Load Test — ○
measurement of changes that occur in the specimen's resistance to deformation during the indentation process, and obtains a wide variety of data. During Indentation size can be measured
7. Step Load–Unload Test — ○
indentation the DUH-211/211S measures dynamic hardness and evaluates the hardness that corresponds to both plastic and elastic deformation. Also, if in tests 1, 2, 4, and 5.
the indentation size is large enough to be observed with a microscope, hardness can be calculated using just the plastic deformation, by measuring the
diagonal length of the indentation.
Test force Test force Test force
Maximum
Expressions for Dynamic Hardness Load F (mN) test force
① 115° triangular pyramid indenter (standard) ③ Vickers indenter (option)
DHT115 = 3.8584 × F / h 2 DHV = 3.8584 × F / h 2 F max F max F n1
② 100° triangular pyramid indenter (option) ④ Knoop indenter (option)
DHT100 = 15.018 × F / h 2 DHK = 1.5583 × F / h 2 Indentation depth h (µm) 0 Minimum 0
test force
Specimen h max Indentation depth 0 h p Indentation h n2 Indentation
F min F n2 depth
2
Even though the theoretical unit for these hardness expressions is kgf/mm , it is normally not used. h h max depth h n1
1. Load–Hold Test 2. Load–Unload Test
Expressions for Martens Hardness (ISO 14577-1 Annex A) 3. Cyclic Test
d 1 4. Depth Setting Test 5. Depth Setting Load–Unload Test
Diagonal lengths
① 115° triangular pyramid indenter (standard) ② Vickers indenter (option) d 1 and d 2 (µm)
2
2
2
HM115 = 1000 F / 26.43 × h [N/mm ] HMV = 1000 F / 26.43 × h [N/mm ] 2 d 2 (Used with Vickers indenter)
Test force Test force
Hold time
Hardness Expressions Based on Diagonal Length Maximum Unload
test force Maximum hold time
test force
① 115° triangular pyramid indenter (standard) ② 100° triangular pyramid indenter (option) ③ Vickers indenter (option) ④ Knoop indenter (option)
HT115 = 160.07 × F / d 2 HT100 = 121.53 × F / d 2 HV = 189.10 × F / d 2 HK = 1451.1 × F / d 2
Minimum
d
0 test force 0
Time Time
d d2 6. Step Load Test 7. Step Load–Unload Test
d1
d: average
DUH-211/211S
6 Dynamic Ultra Micro Hardness Testers 7