Slide item 1

The powder diffractometer was the first instrument installed (1987) and situated in the reactor experimental hall of Multipurpose Research Reactor Ga Siwabessy (RSG-GAS) . It is a standard two-axis type diffractometer with a Si (311) monochromator system that is slightly bent horizontally and focused vertically to enhance the neutron flux at the sample position. Take-off angle of the monochromator can be varied from 0 to 90 degrees allowing some different neutron wavelength to be used.
In collaboration with the Japan Atomic Energy Research Institute (JAERI), in 1995 the diffractometer was modified for residual stress measurement.

Modifications were made by installing a goniometer having three orthogonal translations as well as a turn table to rotate samples around the incident beam with positioning accuracy of 0.1mm. All sample movements and data collection are controlled by personal computers. The size of both incident and scattered beams is defined by apertures having various sizes. The irradiated sample volume is defined by the intersection of the incident and scattered beams in the scattering plane. Latest development includes detector movement mechanism which allows the detector to be moved closer to the sample table and it increases the neutron intensity significantly. The full circle goniometer has also been installed on the sample table making it possible to characterize texture of the samples before performing residual stress measurement. Mini tensile recently installed rig for in-situ measurement of elastic constant for particular crystal plain.

This diffractometer has been used intensively for residual stress measurement of composite materials and alloys. Various alloys such as high and low carbon steel, SUS 304, aluminium alloy, titanium alloy, nickel alloy, zircolloy, magnesium alloy, copper alloy, Silicon-Carbide have been observed by DN1. These samples were prepared by different process i.e., welding, rolling, casting, forging, polishing as well as shot peening. In most cases, the measurement of lattice distance of the specimen were carried out by using theta-2theta scanning. Since scanning using point detector is time consuming, the improvement of data collection using 2-dimensional multi wire proporional counter significantly reduce time for acquiring the data. The diffraction pattern is taken only by putting the 2-D detector at certain position and neutrons diffracted from sample at a certain angle range were counted simultaneously. In-house program based on LabVIEW had been used for controlling DN1.

A. Objectives

1. Theory of Residual Stress measurement using Neutron Diffraction technique
2. Operating neutron diffraction for measuring residual stress
3. Setup the sample for measuring residual stress
4. Make program for sequential measurement
5. Manage and process the data.

B. Benefits

1. Understanding the basic theory of measuring residual stress by neutron diffraction techniques.
2. Arrange samples and measure residual stress using a neutron diffractometer.
3. Knowing the residual stress characteristics of the engineered materials.

i-Concern

International Conference on Nuclear Capacity building, Education, Research and Applications (I-Concern’19) i-Concern is hosted by National Nuclear Energy Agency of Indonesia (BATAN) and is jointly organized with Indonesian Society of Nuclear Medicine (PKNI) and Polytechnic Institute of Nuclear Technology (STTN). The conference will be held in Yogyakarta, Indonesia from 6 -7 September 2019 under the theme “Encouraging Application of Nuclear Science, Technology, Innovation and Human Resources Development Towards Prosperous Indonesia”. The venue will be the Royal Ambarrukmo Hotel in the down town of Yogyakarta.

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Neutron Scattering Laboratory - BATAN
Neutron Beam Technology Division
Center for Science and Technology of Advanced Materials BATAN
Gedung 40, Kawasan Puspiptek Serpong
Tangerang Selatan 15314, INDONESIA
Tel. +62 21 7566727 (direct), 7562860 Ext. 4002 – 4005
Fax +62 21 7560926


NEXPO 2019 is the biggest event on nuclear and its application in 2019. This event is held jointly between Polytechnic Institute of Nuclear Technology, Indonesian Society of Nuclear Medicine (PKNI), and National Nuclear Energy Agency of Indonesia (BATAN) which consists of PSTA, PSTBM, PSMN, PDK, and PAIR.